1;;; cal-hebrew.el --- calendar functions for the Hebrew calendar
2
3;; Copyright (C) 1995, 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4;;   Free Software Foundation, Inc.
5
6;; Author: Nachum Dershowitz <nachum@cs.uiuc.edu>
7;;      Edward M. Reingold <reingold@cs.uiuc.edu>
8;; Maintainer: Glenn Morris <rgm@gnu.org>
9;; Keywords: calendar
10;; Human-Keywords: Hebrew calendar, calendar, diary
11
12;; This file is part of GNU Emacs.
13
14;; GNU Emacs is free software; you can redistribute it and/or modify
15;; it under the terms of the GNU General Public License as published by
16;; the Free Software Foundation; either version 2, or (at your option)
17;; any later version.
18
19;; GNU Emacs is distributed in the hope that it will be useful,
20;; but WITHOUT ANY WARRANTY; without even the implied warranty of
21;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22;; GNU General Public License for more details.
23
24;; You should have received a copy of the GNU General Public License
25;; along with GNU Emacs; see the file COPYING.  If not, write to the
26;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
27;; Boston, MA 02110-1301, USA.
28
29;;; Commentary:
30
31;; This collection of functions implements the features of calendar.el and
32;; diary.el that deal with the Hebrew calendar.
33
34;; Technical details of all the calendrical calculations can be found in
35;; ``Calendrical Calculations: The Millennium Edition'' by Edward M. Reingold
36;; and Nachum Dershowitz, Cambridge University Press (2001).
37
38;;; Code:
39
40(defvar date)
41(defvar displayed-month)
42(defvar displayed-year)
43(defvar entry)
44(defvar number)
45(defvar original-date)
46
47(require 'calendar)
48
49(defun hebrew-calendar-leap-year-p (year)
50  "t if YEAR is a Hebrew calendar leap year."
51  (< (% (1+ (* 7 year)) 19) 7))
52
53(defun hebrew-calendar-last-month-of-year (year)
54  "The last month of the Hebrew calendar YEAR."
55  (if (hebrew-calendar-leap-year-p year)
56      13
57    12))
58
59(defun hebrew-calendar-elapsed-days (year)
60  "Days from Sun. prior to start of Hebrew calendar to mean conjunction of Tishri of Hebrew YEAR."
61  (let* ((months-elapsed
62          (+ (* 235 (/ (1- year) 19));; Months in complete cycles so far.
63             (* 12 (% (1- year) 19))      ;; Regular months in this cycle
64             (/ (1+ (* 7 (% (1- year) 19))) 19)));; Leap months this cycle
65         (parts-elapsed (+ 204 (* 793 (% months-elapsed 1080))))
66         (hours-elapsed (+ 5
67                           (* 12 months-elapsed)
68                           (* 793 (/ months-elapsed 1080))
69                           (/ parts-elapsed 1080)))
70         (parts                                  ;; Conjunction parts
71          (+ (* 1080 (% hours-elapsed 24)) (% parts-elapsed 1080)))
72         (day                                    ;; Conjunction day
73          (+ 1 (* 29 months-elapsed) (/ hours-elapsed 24)))
74         (alternative-day
75          (if (or (>= parts 19440)    ;; If the new moon is at or after midday,
76                  (and (= (% day 7) 2);; ...or is on a Tuesday...
77                       (>= parts 9924)  ;;    at 9 hours, 204 parts or later...
78                       (not (hebrew-calendar-leap-year-p year)));; of a
79                                                                ;; common year,
80                  (and (= (% day 7) 1);; ...or is on a Monday...
81                       (>= parts 16789) ;;   at 15 hours, 589 parts or later...
82                       (hebrew-calendar-leap-year-p (1- year))));; at the end
83                                                     ;; of a leap year
84       ;; Then postpone Rosh HaShanah one day
85              (1+ day)
86       ;; Else
87            day)))
88    (if ;; If Rosh HaShanah would occur on Sunday, Wednesday, or Friday
89        (memq (% alternative-day 7) (list 0 3 5))
90  ;; Then postpone it one (more) day and return
91        (1+ alternative-day)
92  ;; Else return
93      alternative-day)))
94
95(defun hebrew-calendar-days-in-year (year)
96  "Number of days in Hebrew YEAR."
97  (- (hebrew-calendar-elapsed-days (1+ year))
98     (hebrew-calendar-elapsed-days year)))
99
100(defun hebrew-calendar-long-heshvan-p (year)
101  "t if Heshvan is long in Hebrew YEAR."
102  (= (% (hebrew-calendar-days-in-year year) 10) 5))
103
104(defun hebrew-calendar-short-kislev-p (year)
105  "t if Kislev is short in Hebrew YEAR."
106  (= (% (hebrew-calendar-days-in-year year) 10) 3))
107
108(defun hebrew-calendar-last-day-of-month (month year)
109  "The last day of MONTH in YEAR."
110  (if (or (memq month (list 2 4 6 10 13))
111          (and (= month 12) (not (hebrew-calendar-leap-year-p year)))
112          (and (= month 8) (not (hebrew-calendar-long-heshvan-p year)))
113          (and (= month 9) (hebrew-calendar-short-kislev-p year)))
114      29
115    30))
116
117(defun calendar-absolute-from-hebrew (date)
118  "Absolute date of Hebrew DATE.
119The absolute date is the number of days elapsed since the (imaginary)
120Gregorian date Sunday, December 31, 1 BC."
121  (let* ((month (extract-calendar-month date))
122         (day (extract-calendar-day date))
123         (year (extract-calendar-year date)))
124    (+ day                            ;; Days so far this month.
125       (if (< month 7);; before Tishri
126     ;; Then add days in prior months this year before and after Nisan
127           (+ (calendar-sum
128               m 7 (<= m (hebrew-calendar-last-month-of-year year))
129               (hebrew-calendar-last-day-of-month m year))
130              (calendar-sum
131               m 1 (< m month)
132               (hebrew-calendar-last-day-of-month m year)))
133     ;; Else add days in prior months this year
134         (calendar-sum
135          m 7 (< m month)
136          (hebrew-calendar-last-day-of-month m year)))
137    (hebrew-calendar-elapsed-days year);; Days in prior years.
138    -1373429)))                        ;; Days elapsed before absolute date 1.
139
140(defun calendar-hebrew-from-absolute (date)
141  "Compute the Hebrew date (month day year) corresponding to absolute DATE.
142The absolute date is the number of days elapsed since the (imaginary)
143Gregorian date Sunday, December 31, 1 BC."
144  (let* ((greg-date (calendar-gregorian-from-absolute date))
145         (month (aref [9 10 11 12 1 2 3 4 7 7 7 8]
146                 (1- (extract-calendar-month greg-date))))
147         (day)
148         (year (+ 3760 (extract-calendar-year greg-date))))
149    (while (>= date (calendar-absolute-from-hebrew (list 7 1 (1+ year))))
150        (setq year (1+ year)))
151    (let ((length (hebrew-calendar-last-month-of-year year)))
152      (while (> date
153                (calendar-absolute-from-hebrew
154                 (list month
155                       (hebrew-calendar-last-day-of-month month year)
156                       year)))
157        (setq month (1+ (% month length)))))
158    (setq day (1+
159               (- date (calendar-absolute-from-hebrew (list month 1 year)))))
160    (list month day year)))
161
162(defvar calendar-hebrew-month-name-array-common-year
163  ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
164   "Heshvan" "Kislev" "Teveth" "Shevat" "Adar"]
165"Array of strings giving the names of the Hebrew months in a common year.")
166
167(defvar calendar-hebrew-month-name-array-leap-year
168  ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
169   "Heshvan" "Kislev" "Teveth" "Shevat" "Adar I" "Adar II"]
170"Array of strings giving the names of the Hebrew months in a leap year.")
171
172(defun calendar-hebrew-date-string (&optional date)
173  "String of Hebrew date before sunset of Gregorian DATE.
174Defaults to today's date if DATE is not given.
175Driven by the variable `calendar-date-display-form'."
176  (let* ((hebrew-date (calendar-hebrew-from-absolute
177                       (calendar-absolute-from-gregorian
178                        (or date (calendar-current-date)))))
179         (calendar-month-name-array
180          (if (hebrew-calendar-leap-year-p (extract-calendar-year hebrew-date))
181              calendar-hebrew-month-name-array-leap-year
182            calendar-hebrew-month-name-array-common-year)))
183    (calendar-date-string hebrew-date nil t)))
184
185(defun calendar-print-hebrew-date ()
186  "Show the Hebrew calendar equivalent of the date under the cursor."
187  (interactive)
188  (message "Hebrew date (until sunset): %s"
189           (calendar-hebrew-date-string (calendar-cursor-to-date t))))
190
191(defun hebrew-calendar-yahrzeit (death-date year)
192  "Absolute date of the anniversary of Hebrew DEATH-DATE in Hebrew YEAR."
193  (let* ((death-day (extract-calendar-day death-date))
194         (death-month (extract-calendar-month death-date))
195         (death-year (extract-calendar-year death-date)))
196    (cond
197     ;; If it's Heshvan 30 it depends on the first anniversary; if
198     ;; that was not Heshvan 30, use the day before Kislev 1.
199     ((and (= death-month 8)
200           (= death-day 30)
201           (not (hebrew-calendar-long-heshvan-p (1+ death-year))))
202      (1- (calendar-absolute-from-hebrew (list 9 1 year))))
203     ;; If it's Kislev 30 it depends on the first anniversary; if
204     ;; that was not Kislev 30, use the day before Teveth 1.
205     ((and (= death-month 9)
206           (= death-day 30)
207           (hebrew-calendar-short-kislev-p (1+ death-year)))
208      (1- (calendar-absolute-from-hebrew (list 10 1 year))))
209     ;; If it's Adar II, use the same day in last month of
210     ;; year (Adar or Adar II).
211     ((= death-month 13)
212      (calendar-absolute-from-hebrew
213       (list (hebrew-calendar-last-month-of-year year) death-day year)))
214     ;; If it's the 30th in Adar I and year is not a leap year
215     ;; (so Adar has only 29 days), use the last day in Shevat.
216     ((and (= death-day 30)
217           (= death-month 12)
218           (not (hebrew-calendar-leap-year-p year)))
219      (calendar-absolute-from-hebrew (list 11 30 year)))
220     ;; In all other cases, use the normal anniversary of the date of death.
221     (t (calendar-absolute-from-hebrew
222         (list death-month death-day year))))))
223
224(defun calendar-goto-hebrew-date (date &optional noecho)
225  "Move cursor to Hebrew DATE; echo Hebrew date unless NOECHO is t."
226  (interactive
227   (let* ((today (calendar-current-date))
228          (year (calendar-read
229                 "Hebrew calendar year (>3760): "
230                 '(lambda (x) (> x 3760))
231                 (int-to-string
232                  (extract-calendar-year
233                   (calendar-hebrew-from-absolute
234                    (calendar-absolute-from-gregorian today))))))
235          (month-array (if (hebrew-calendar-leap-year-p year)
236                           calendar-hebrew-month-name-array-leap-year
237                         calendar-hebrew-month-name-array-common-year))
238          (completion-ignore-case t)
239          (month (cdr (assoc-string
240                       (completing-read
241                        "Hebrew calendar month name: "
242                        (mapcar 'list (append month-array nil))
243                        (if (= year 3761)
244                            '(lambda (x)
245                               (let ((m (cdr
246                                         (assoc-string
247                                          (car x)
248                                          (calendar-make-alist month-array)
249                                          t))))
250                                 (< 0
251                                    (calendar-absolute-from-hebrew
252                                     (list m
253                                           (hebrew-calendar-last-day-of-month
254                                            m year)
255                                           year))))))
256                        t)
257                       (calendar-make-alist month-array 1) t)))
258          (last (hebrew-calendar-last-day-of-month month year))
259          (first (if (and (= year 3761) (= month 10))
260                     18 1))
261          (day (calendar-read
262                (format "Hebrew calendar day (%d-%d): "
263                        first last)
264                '(lambda (x) (and (<= first x) (<= x last))))))
265     (list (list month day year))))
266  (calendar-goto-date (calendar-gregorian-from-absolute
267                       (calendar-absolute-from-hebrew date)))
268  (or noecho (calendar-print-hebrew-date)))
269
270(defun holiday-hebrew (month day string)
271  "Holiday on MONTH, DAY (Hebrew) called STRING.
272If MONTH, DAY (Hebrew) is visible, the value returned is corresponding
273Gregorian date in the form of the list (((month day year) STRING)).  Returns
274nil if it is not visible in the current calendar window."
275  (if (memq displayed-month;;  This test is only to speed things up a bit;
276            (list          ;;  it works fine without the test too.
277             (if (< 11 month) (- month 11) (+ month 1))
278             (if (< 10 month) (- month 10) (+ month 2))
279             (if (<  9 month) (- month  9) (+ month 3))
280             (if (<  8 month) (- month  8) (+ month 4))
281             (if (<  7 month) (- month  7) (+ month 5))))
282      (let ((m1 displayed-month)
283            (y1 displayed-year)
284            (m2 displayed-month)
285            (y2 displayed-year)
286            (year))
287        (increment-calendar-month m1 y1 -1)
288        (increment-calendar-month m2 y2 1)
289        (let* ((start-date (calendar-absolute-from-gregorian
290                            (list m1 1 y1)))
291               (end-date (calendar-absolute-from-gregorian
292                          (list m2 (calendar-last-day-of-month m2 y2) y2)))
293               (hebrew-start (calendar-hebrew-from-absolute start-date))
294               (hebrew-end (calendar-hebrew-from-absolute end-date))
295               (hebrew-y1 (extract-calendar-year hebrew-start))
296               (hebrew-y2 (extract-calendar-year hebrew-end)))
297          (setq year (if (< 6 month) hebrew-y2 hebrew-y1))
298          (let ((date (calendar-gregorian-from-absolute
299                       (calendar-absolute-from-hebrew
300                        (list month day year)))))
301            (if (calendar-date-is-visible-p date)
302                (list (list date string))))))))
303
304(defun holiday-rosh-hashanah-etc ()
305  "List of dates related to Rosh Hashanah, as visible in calendar window."
306  (if (or (< displayed-month 8)
307          (> displayed-month 11))
308      nil;; None of the dates is visible
309    (let* ((abs-r-h (calendar-absolute-from-hebrew
310                      (list 7 1 (+ displayed-year 3761))))
311            (mandatory
312             (list
313              (list (calendar-gregorian-from-absolute abs-r-h)
314                    (format "Rosh HaShanah %d" (+ 3761 displayed-year)))
315              (list (calendar-gregorian-from-absolute (+ abs-r-h 9))
316                    "Yom Kippur")
317              (list (calendar-gregorian-from-absolute (+ abs-r-h 14))
318                    "Sukkot")
319              (list (calendar-gregorian-from-absolute (+ abs-r-h 21))
320                    "Shemini Atzeret")
321              (list (calendar-gregorian-from-absolute (+ abs-r-h 22))
322                    "Simchat Torah")))
323           (optional
324            (list
325             (list (calendar-gregorian-from-absolute
326                    (calendar-dayname-on-or-before 6 (- abs-r-h 4)))
327                   "Selichot (night)")
328             (list (calendar-gregorian-from-absolute (1- abs-r-h))
329                   "Erev Rosh HaShanah")
330             (list (calendar-gregorian-from-absolute (1+ abs-r-h))
331                   "Rosh HaShanah (second day)")
332             (list (calendar-gregorian-from-absolute
333                    (if (= (% abs-r-h 7) 4) (+ abs-r-h 3) (+ abs-r-h 2)))
334                   "Tzom Gedaliah")
335             (list (calendar-gregorian-from-absolute
336                    (calendar-dayname-on-or-before 6 (+ 7 abs-r-h)))
337                   "Shabbat Shuvah")
338             (list (calendar-gregorian-from-absolute (+ abs-r-h 8))
339                   "Erev Yom Kippur")
340             (list (calendar-gregorian-from-absolute (+ abs-r-h 13))
341                   "Erev Sukkot")
342             (list (calendar-gregorian-from-absolute (+ abs-r-h 15))
343                   "Sukkot (second day)")
344             (list (calendar-gregorian-from-absolute (+ abs-r-h 16))
345                   "Hol Hamoed Sukkot (first day)")
346             (list (calendar-gregorian-from-absolute (+ abs-r-h 17))
347                   "Hol Hamoed Sukkot (second day)")
348             (list (calendar-gregorian-from-absolute (+ abs-r-h 18))
349                   "Hol Hamoed Sukkot (third day)")
350             (list (calendar-gregorian-from-absolute (+ abs-r-h 19))
351                   "Hol Hamoed Sukkot (fourth day)")
352             (list (calendar-gregorian-from-absolute (+ abs-r-h 20))
353                   "Hoshanah Rabbah")))
354            (output-list
355             (filter-visible-calendar-holidays mandatory)))
356      (if all-hebrew-calendar-holidays
357          (setq output-list
358                (append
359                 (filter-visible-calendar-holidays optional)
360                 output-list)))
361      output-list)))
362
363(defun holiday-hanukkah ()
364  "List of dates related to Hanukkah, as visible in calendar window."
365    (if (memq displayed-month;;  This test is only to speed things up a bit;
366              '(10 11 12 1 2));; it works fine without the test too.
367        (let ((m displayed-month)
368              (y displayed-year))
369          (increment-calendar-month m y 1)
370          (let* ((h-y (extract-calendar-year
371                         (calendar-hebrew-from-absolute
372                          (calendar-absolute-from-gregorian
373                           (list m (calendar-last-day-of-month m y) y)))))
374                 (abs-h (calendar-absolute-from-hebrew (list 9 25 h-y))))
375            (filter-visible-calendar-holidays
376             (list
377              (list (calendar-gregorian-from-absolute (1- abs-h))
378                    "Erev Hanukkah")
379              (list (calendar-gregorian-from-absolute abs-h)
380                    "Hanukkah (first day)")
381              (list (calendar-gregorian-from-absolute (1+ abs-h))
382                    "Hanukkah (second day)")
383              (list (calendar-gregorian-from-absolute (+ abs-h 2))
384                    "Hanukkah (third day)")
385              (list (calendar-gregorian-from-absolute (+ abs-h 3))
386                    "Hanukkah (fourth day)")
387              (list (calendar-gregorian-from-absolute (+ abs-h 4))
388                    "Hanukkah (fifth day)")
389              (list (calendar-gregorian-from-absolute (+ abs-h 5))
390                    "Hanukkah (sixth day)")
391              (list (calendar-gregorian-from-absolute (+ abs-h 6))
392                    "Hanukkah (seventh day)")
393              (list (calendar-gregorian-from-absolute (+ abs-h 7))
394                    "Hanukkah (eighth day)")))))))
395
396(defun holiday-passover-etc ()
397  "List of dates related to Passover, as visible in calendar window."
398 (if (< 7 displayed-month)
399      nil;; None of the dates is visible
400    (let* ((abs-p (calendar-absolute-from-hebrew
401                      (list 1 15 (+ displayed-year 3760))))
402           (mandatory
403            (list
404             (list (calendar-gregorian-from-absolute abs-p)
405                   "Passover")
406             (list (calendar-gregorian-from-absolute (+ abs-p 50))
407                   "Shavuot")))
408           (optional
409            (list
410             (list (calendar-gregorian-from-absolute
411                    (calendar-dayname-on-or-before 6 (- abs-p 43)))
412                   "Shabbat Shekalim")
413             (list (calendar-gregorian-from-absolute
414                    (calendar-dayname-on-or-before 6 (- abs-p 30)))
415                   "Shabbat Zachor")
416             (list (calendar-gregorian-from-absolute
417                    (if (= (% abs-p 7) 2) (- abs-p 33) (- abs-p 31)))
418                   "Fast of Esther")
419             (list (calendar-gregorian-from-absolute (- abs-p 31))
420                   "Erev Purim")
421             (list (calendar-gregorian-from-absolute (- abs-p 30))
422                   "Purim")
423             (list (calendar-gregorian-from-absolute
424                    (if (zerop (% abs-p 7)) (- abs-p 28) (- abs-p 29)))
425                   "Shushan Purim")
426             (list (calendar-gregorian-from-absolute
427                    (- (calendar-dayname-on-or-before 6 (- abs-p 14)) 7))
428                   "Shabbat Parah")
429             (list (calendar-gregorian-from-absolute
430                    (calendar-dayname-on-or-before 6 (- abs-p 14)))
431                   "Shabbat HaHodesh")
432             (list (calendar-gregorian-from-absolute
433                    (calendar-dayname-on-or-before 6 (1- abs-p)))
434                   "Shabbat HaGadol")
435             (list (calendar-gregorian-from-absolute (1- abs-p))
436                   "Erev Passover")
437             (list (calendar-gregorian-from-absolute (1+ abs-p))
438                   "Passover (second day)")
439             (list (calendar-gregorian-from-absolute (+ abs-p 2))
440                   "Hol Hamoed Passover (first day)")
441             (list (calendar-gregorian-from-absolute (+ abs-p 3))
442                   "Hol Hamoed Passover (second day)")
443             (list (calendar-gregorian-from-absolute (+ abs-p 4))
444                   "Hol Hamoed Passover (third day)")
445             (list (calendar-gregorian-from-absolute (+ abs-p 5))
446                   "Hol Hamoed Passover (fourth day)")
447             (list (calendar-gregorian-from-absolute (+ abs-p 6))
448                   "Passover (seventh day)")
449             (list (calendar-gregorian-from-absolute (+ abs-p 7))
450                   "Passover (eighth day)")
451             (list (calendar-gregorian-from-absolute
452                    (if (zerop (% (+ abs-p 12) 7))
453                        (+ abs-p 13)
454                      (+ abs-p 12)))
455                   "Yom HaShoah")
456             (list (calendar-gregorian-from-absolute
457                    (if (zerop (% abs-p 7))
458                        (+ abs-p 18)
459                      (if (= (% abs-p 7) 6)
460                          (+ abs-p 19)
461                        (+ abs-p 20))))
462                   "Yom HaAtzma'ut")
463             (list (calendar-gregorian-from-absolute (+ abs-p 33))
464                   "Lag BaOmer")
465             (list (calendar-gregorian-from-absolute (+ abs-p 43))
466                   "Yom Yerushalaim")
467             (list (calendar-gregorian-from-absolute (+ abs-p 49))
468                   "Erev Shavuot")
469             (list (calendar-gregorian-from-absolute (+ abs-p 51))
470                   "Shavuot (second day)")))
471           (output-list
472             (filter-visible-calendar-holidays mandatory)))
473      (if all-hebrew-calendar-holidays
474          (setq output-list
475                (append
476                 (filter-visible-calendar-holidays optional)
477                 output-list)))
478      output-list)))
479
480(defun holiday-tisha-b-av-etc ()
481  "List of dates around Tisha B'Av, as visible in calendar window."
482  (if (or (< displayed-month 5)
483          (> displayed-month 9))
484      nil;; None of the dates is visible
485    (let* ((abs-t-a (calendar-absolute-from-hebrew
486                      (list 5 9 (+ displayed-year 3760)))))
487
488      (filter-visible-calendar-holidays
489       (list
490        (list (calendar-gregorian-from-absolute
491               (if (= (% abs-t-a 7) 6) (- abs-t-a 20) (- abs-t-a 21)))
492              "Tzom Tammuz")
493        (list (calendar-gregorian-from-absolute
494               (calendar-dayname-on-or-before 6 abs-t-a))
495              "Shabbat Hazon")
496        (list (calendar-gregorian-from-absolute
497               (if (= (% abs-t-a 7) 6) (1+ abs-t-a) abs-t-a))
498              "Tisha B'Av")
499        (list (calendar-gregorian-from-absolute
500               (calendar-dayname-on-or-before 6 (+ abs-t-a 7)))
501              "Shabbat Nahamu"))))))
502
503(defun list-hebrew-diary-entries ()
504  "Add any Hebrew date entries from the diary file to `diary-entries-list'.
505Hebrew date diary entries must be prefaced by `hebrew-diary-entry-symbol'
506\(normally an `H').  The same diary date forms govern the style of the Hebrew
507calendar entries, except that the Hebrew month names must be spelled in full.
508The Hebrew months are numbered from 1 to 13 with Nisan being 1, 12 being
509Adar I and 13 being Adar II; you must use `Adar I' if you want Adar of a
510common Hebrew year.  If a Hebrew date diary entry begins with a
511`diary-nonmarking-symbol', the entry will appear in the diary listing, but will
512not be marked in the calendar.  This function is provided for use with the
513`nongregorian-diary-listing-hook'."
514  (if (< 0 number)
515      (let ((buffer-read-only nil)
516            (diary-modified (buffer-modified-p))
517            (gdate original-date)
518            (mark (regexp-quote diary-nonmarking-symbol)))
519        (calendar-for-loop i from 1 to number do
520           (let* ((d diary-date-forms)
521                  (hdate (calendar-hebrew-from-absolute
522                          (calendar-absolute-from-gregorian gdate)))
523                  (month (extract-calendar-month hdate))
524                  (day (extract-calendar-day hdate))
525                  (year (extract-calendar-year hdate)))
526             (while d
527               (let*
528                   ((date-form (if (equal (car (car d)) 'backup)
529                                   (cdr (car d))
530                                 (car d)))
531                    (backup (equal (car (car d)) 'backup))
532                    (dayname
533                     (format "%s\\|%s\\.?"
534                             (calendar-day-name gdate)
535                             (calendar-day-name gdate 'abbrev)))
536                    (calendar-month-name-array
537                     calendar-hebrew-month-name-array-leap-year)
538                    (monthname
539                     (concat
540                      "\\*\\|"
541                      (calendar-month-name month)))
542                    (month (concat "\\*\\|0*" (int-to-string month)))
543                    (day (concat "\\*\\|0*" (int-to-string day)))
544                    (year
545                     (concat
546                      "\\*\\|0*" (int-to-string year)
547                      (if abbreviated-calendar-year
548                          (concat "\\|" (int-to-string (% year 100)))
549                        "")))
550                    (regexp
551                     (concat
552                      "\\(\\`\\|\^M\\|\n\\)" mark "?"
553                      (regexp-quote hebrew-diary-entry-symbol)
554                      "\\("
555                      (mapconcat 'eval date-form "\\)\\(")
556                      "\\)"))
557                    (case-fold-search t))
558                 (goto-char (point-min))
559                 (while (re-search-forward regexp nil t)
560                   (if backup (re-search-backward "\\<" nil t))
561                   (if (and (or (char-equal (preceding-char) ?\^M)
562                                (char-equal (preceding-char) ?\n))
563                            (not (looking-at " \\|\^I")))
564                       ;;  Diary entry that consists only of date.
565                       (backward-char 1)
566                     ;;  Found a nonempty diary entry--make it visible and
567                     ;;  add it to the list.
568                     (let ((entry-start (point))
569                           (date-start))
570                       (re-search-backward "\^M\\|\n\\|\\`")
571                       (setq date-start (point))
572                       (re-search-forward "\^M\\|\n" nil t 2)
573                       (while (looking-at " \\|\^I")
574                         (re-search-forward "\^M\\|\n" nil t))
575                       (backward-char 1)
576                       (subst-char-in-region date-start (point) ?\^M ?\n t)
577                       (add-to-diary-list
578                        gdate
579                        (buffer-substring-no-properties entry-start (point))
580                        (buffer-substring-no-properties
581                         (1+ date-start) (1- entry-start))
582                        (copy-marker entry-start))))))
583               (setq d (cdr d))))
584           (setq gdate
585                 (calendar-gregorian-from-absolute
586                  (1+ (calendar-absolute-from-gregorian gdate)))))
587           (set-buffer-modified-p diary-modified))
588        (goto-char (point-min))))
589
590(defun mark-hebrew-calendar-date-pattern (month day year)
591  "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR.
592A value of 0 in any position is a wildcard."
593  (save-excursion
594    (set-buffer calendar-buffer)
595    (if (and (/= 0 month) (/= 0 day))
596        (if (/= 0 year)
597            ;; Fully specified Hebrew date.
598            (let ((date (calendar-gregorian-from-absolute
599                         (calendar-absolute-from-hebrew
600                          (list month day year)))))
601              (if (calendar-date-is-visible-p date)
602                  (mark-visible-calendar-date date)))
603          ;; Month and day in any year--this taken from the holiday stuff.
604          (if (memq displayed-month;;  This test is only to speed things up a
605                    (list          ;;  bit; it works fine without the test too.
606                     (if (< 11 month) (- month 11) (+ month 1))
607                     (if (< 10 month) (- month 10) (+ month 2))
608                     (if (<  9 month) (- month  9) (+ month 3))
609                     (if (<  8 month) (- month  8) (+ month 4))
610                     (if (<  7 month) (- month  7) (+ month 5))))
611              (let ((m1 displayed-month)
612                    (y1 displayed-year)
613                    (m2 displayed-month)
614                    (y2 displayed-year)
615                    (year))
616                (increment-calendar-month m1 y1 -1)
617                (increment-calendar-month m2 y2 1)
618                (let* ((start-date (calendar-absolute-from-gregorian
619                                    (list m1 1 y1)))
620                       (end-date (calendar-absolute-from-gregorian
621                                  (list m2
622                                        (calendar-last-day-of-month m2 y2)
623                                        y2)))
624                       (hebrew-start
625                        (calendar-hebrew-from-absolute start-date))
626                       (hebrew-end (calendar-hebrew-from-absolute end-date))
627                       (hebrew-y1 (extract-calendar-year hebrew-start))
628                       (hebrew-y2 (extract-calendar-year hebrew-end)))
629                  (setq year (if (< 6 month) hebrew-y2 hebrew-y1))
630                  (let ((date (calendar-gregorian-from-absolute
631                               (calendar-absolute-from-hebrew
632                                (list month day year)))))
633                    (if (calendar-date-is-visible-p date)
634                        (mark-visible-calendar-date date)))))))
635      ;; Not one of the simple cases--check all visible dates for match.
636      ;; Actually, the following code takes care of ALL of the cases, but
637      ;; it's much too slow to be used for the simple (common) cases.
638      (let ((m displayed-month)
639            (y displayed-year)
640            (first-date)
641            (last-date))
642        (increment-calendar-month m y -1)
643        (setq first-date
644              (calendar-absolute-from-gregorian
645               (list m 1 y)))
646        (increment-calendar-month m y 2)
647        (setq last-date
648              (calendar-absolute-from-gregorian
649               (list m (calendar-last-day-of-month m y) y)))
650        (calendar-for-loop date from first-date to last-date do
651          (let* ((h-date (calendar-hebrew-from-absolute date))
652                 (h-month (extract-calendar-month h-date))
653                 (h-day (extract-calendar-day h-date))
654                 (h-year (extract-calendar-year h-date)))
655            (and (or (zerop month)
656                     (= month h-month))
657                 (or (zerop day)
658                     (= day h-day))
659                 (or (zerop year)
660                     (= year h-year))
661                 (mark-visible-calendar-date
662                  (calendar-gregorian-from-absolute date)))))))))
663
664(defun mark-hebrew-diary-entries ()
665  "Mark days in the calendar window that have Hebrew date diary entries.
666Each entry in diary-file (or included files) visible in the calendar window
667is marked.  Hebrew date entries are prefaced by a hebrew-diary-entry-symbol
668\(normally an `H').  The same diary-date-forms govern the style of the Hebrew
669calendar entries, except that the Hebrew month names must be spelled in full.
670The Hebrew months are numbered from 1 to 13 with Nisan being 1, 12 being
671Adar I and 13 being Adar II; you must use `Adar I' if you want Adar of a
672common Hebrew year.  Hebrew date diary entries that begin with a
673diary-nonmarking symbol will not be marked in the calendar.  This function
674is provided for use as part of the nongregorian-diary-marking-hook."
675  (let ((d diary-date-forms))
676    (while d
677      (let*
678          ((date-form (if (equal (car (car d)) 'backup)
679                          (cdr (car d))
680                        (car d)));; ignore 'backup directive
681           (dayname (diary-name-pattern calendar-day-name-array
682                                        calendar-day-abbrev-array))
683           (monthname
684            (format "%s\\|\\*"
685                    (diary-name-pattern
686                     calendar-hebrew-month-name-array-leap-year)))
687           (month "[0-9]+\\|\\*")
688           (day "[0-9]+\\|\\*")
689           (year "[0-9]+\\|\\*")
690           (l (length date-form))
691           (d-name-pos (- l (length (memq 'dayname date-form))))
692           (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos)))
693           (m-name-pos (- l (length (memq 'monthname date-form))))
694           (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos)))
695           (d-pos (- l (length (memq 'day date-form))))
696           (d-pos (if (/= l d-pos) (+ 2 d-pos)))
697           (m-pos (- l (length (memq 'month date-form))))
698           (m-pos (if (/= l m-pos) (+ 2 m-pos)))
699           (y-pos (- l (length (memq 'year date-form))))
700           (y-pos (if (/= l y-pos) (+ 2 y-pos)))
701           (regexp
702            (concat
703             "\\(\\`\\|\^M\\|\n\\)"
704             (regexp-quote hebrew-diary-entry-symbol)
705             "\\("
706             (mapconcat 'eval date-form "\\)\\(")
707             "\\)"))
708           (case-fold-search t))
709        (goto-char (point-min))
710        (while (re-search-forward regexp nil t)
711          (let* ((dd-name
712                  (if d-name-pos
713                      (buffer-substring
714                       (match-beginning d-name-pos)
715                       (match-end d-name-pos))))
716                 (mm-name
717                  (if m-name-pos
718                      (buffer-substring
719                       (match-beginning m-name-pos)
720                       (match-end m-name-pos))))
721                 (mm (string-to-number
722                      (if m-pos
723                          (buffer-substring
724                           (match-beginning m-pos)
725                           (match-end m-pos))
726                        "")))
727                 (dd (string-to-number
728                      (if d-pos
729                          (buffer-substring
730                           (match-beginning d-pos)
731                           (match-end d-pos))
732                        "")))
733                 (y-str (if y-pos
734                            (buffer-substring
735                             (match-beginning y-pos)
736                             (match-end y-pos))))
737                 (yy (if (not y-str)
738                         0
739                       (if (and (= (length y-str) 2)
740                                abbreviated-calendar-year)
741                           (let* ((current-y
742                                   (extract-calendar-year
743                                    (calendar-hebrew-from-absolute
744                                     (calendar-absolute-from-gregorian
745                                      (calendar-current-date)))))
746                                  (y (+ (string-to-number y-str)
747                                        (* 100 (/ current-y 100)))))
748                             (if (> (- y current-y) 50)
749                                 (- y 100)
750                               (if (> (- current-y y) 50)
751                                   (+ y 100)
752                                 y)))
753                         (string-to-number y-str)))))
754            (if dd-name
755                (mark-calendar-days-named
756                 (cdr (assoc-string dd-name
757                                         (calendar-make-alist
758                                          calendar-day-name-array
759                                          0 nil calendar-day-abbrev-array) t)))
760              (if mm-name
761                  (setq mm
762                        (if (string-equal mm-name "*") 0
763                          (cdr
764                           (assoc-string
765                            mm-name
766                            (calendar-make-alist
767                             calendar-hebrew-month-name-array-leap-year) t)))))
768              (mark-hebrew-calendar-date-pattern mm dd yy)))))
769      (setq d (cdr d)))))
770
771(defun insert-hebrew-diary-entry (arg)
772  "Insert a diary entry.
773For the Hebrew date corresponding to the date indicated by point.
774Prefix arg will make the entry nonmarking."
775  (interactive "P")
776  (let* ((calendar-month-name-array
777          calendar-hebrew-month-name-array-leap-year))
778    (make-diary-entry
779     (concat
780      hebrew-diary-entry-symbol
781      (calendar-date-string
782       (calendar-hebrew-from-absolute
783        (calendar-absolute-from-gregorian
784         (calendar-cursor-to-date t)))
785       nil t))
786     arg)))
787
788(defun insert-monthly-hebrew-diary-entry (arg)
789  "Insert a monthly diary entry.
790For the day of the Hebrew month corresponding to the date indicated by point.
791Prefix arg will make the entry nonmarking."
792  (interactive "P")
793  (let* ((calendar-date-display-form
794          (if european-calendar-style '(day " * ") '("* " day )))
795         (calendar-month-name-array
796          calendar-hebrew-month-name-array-leap-year))
797    (make-diary-entry
798     (concat
799      hebrew-diary-entry-symbol
800      (calendar-date-string
801       (calendar-hebrew-from-absolute
802        (calendar-absolute-from-gregorian
803         (calendar-cursor-to-date t)))))
804     arg)))
805
806(defun insert-yearly-hebrew-diary-entry (arg)
807  "Insert an annual diary entry.
808For the day of the Hebrew year corresponding to the date indicated by point.
809Prefix arg will make the entry nonmarking."
810  (interactive "P")
811  (let* ((calendar-date-display-form
812          (if european-calendar-style
813              '(day " " monthname)
814            '(monthname " " day)))
815         (calendar-month-name-array
816          calendar-hebrew-month-name-array-leap-year))
817    (make-diary-entry
818     (concat
819      hebrew-diary-entry-symbol
820      (calendar-date-string
821       (calendar-hebrew-from-absolute
822        (calendar-absolute-from-gregorian
823         (calendar-cursor-to-date t)))))
824     arg)))
825
826;;;###autoload
827(defun list-yahrzeit-dates (death-date start-year end-year)
828  "List Yahrzeit dates for *Gregorian* DEATH-DATE from START-YEAR to END-YEAR.
829When called interactively from the calendar window, the date of death is taken
830from the cursor position."
831  (interactive
832   (let* ((death-date
833           (if (equal (current-buffer) (get-buffer calendar-buffer))
834               (calendar-cursor-to-date)
835             (let* ((today (calendar-current-date))
836                    (year (calendar-read
837                           "Year of death (>0): "
838                           '(lambda (x) (> x 0))
839                           (int-to-string (extract-calendar-year today))))
840                    (month-array calendar-month-name-array)
841                    (completion-ignore-case t)
842                    (month (cdr (assoc-string
843                                 (completing-read
844                                  "Month of death (name): "
845                                  (mapcar 'list (append month-array nil))
846                                  nil t)
847                                 (calendar-make-alist month-array 1) t)))
848                    (last (calendar-last-day-of-month month year))
849                    (day (calendar-read
850                          (format "Day of death (1-%d): " last)
851                          '(lambda (x) (and (< 0 x) (<= x last))))))
852               (list month day year))))
853          (death-year (extract-calendar-year death-date))
854          (start-year (calendar-read
855                       (format "Starting year of Yahrzeit table (>%d): "
856                               death-year)
857                       '(lambda (x) (> x death-year))
858                       (int-to-string (1+ death-year))))
859          (end-year (calendar-read
860                     (format "Ending year of Yahrzeit table (>=%d): "
861                             start-year)
862                       '(lambda (x) (>= x start-year)))))
863   (list death-date start-year end-year)))
864  (message "Computing yahrzeits...")
865  (let* ((yahrzeit-buffer "*Yahrzeits*")
866         (h-date (calendar-hebrew-from-absolute
867                  (calendar-absolute-from-gregorian death-date)))
868         (h-month (extract-calendar-month h-date))
869         (h-day (extract-calendar-day h-date))
870         (h-year (extract-calendar-year h-date)))
871    (set-buffer (get-buffer-create yahrzeit-buffer))
872    (setq buffer-read-only nil)
873    (calendar-set-mode-line
874     (format "Yahrzeit dates for %s = %s"
875             (calendar-date-string death-date)
876             (let ((calendar-month-name-array
877                    (if (hebrew-calendar-leap-year-p h-year)
878                        calendar-hebrew-month-name-array-leap-year
879                      calendar-hebrew-month-name-array-common-year)))
880               (calendar-date-string h-date nil t))))
881    (erase-buffer)
882    (goto-char (point-min))
883    (calendar-for-loop i from start-year to end-year do
884        (insert
885         (calendar-date-string
886          (calendar-gregorian-from-absolute
887           (hebrew-calendar-yahrzeit
888            h-date
889            (extract-calendar-year
890             (calendar-hebrew-from-absolute
891              (calendar-absolute-from-gregorian (list 1 1 i))))))) "\n"))
892    (goto-char (point-min))
893    (set-buffer-modified-p nil)
894    (setq buffer-read-only t)
895    (display-buffer yahrzeit-buffer)
896    (message "Computing yahrzeits...done")))
897
898(defun diary-hebrew-date ()
899  "Hebrew calendar equivalent of date diary entry."
900  (format "Hebrew date (until sunset): %s" (calendar-hebrew-date-string date)))
901
902(defun diary-omer (&optional mark)
903  "Omer count diary entry.
904Entry applies if date is within 50 days after Passover.
905
906An optional parameter MARK specifies a face or single-character string to
907use when highlighting the day in the calendar."
908  (let* ((passover
909          (calendar-absolute-from-hebrew
910           (list 1 15 (+ (extract-calendar-year date) 3760))))
911         (omer (- (calendar-absolute-from-gregorian date) passover))
912         (week (/ omer 7))
913         (day (% omer 7)))
914    (if (and (> omer 0) (< omer 50))
915        (cons mark
916	      (format "Day %d%s of the omer (until sunset)"
917		      omer
918		      (if (zerop week)
919			  ""
920			(format ", that is, %d week%s%s"
921				week
922				(if (= week 1) "" "s")
923				(if (zerop day)
924				    ""
925				  (format " and %d day%s"
926					  day (if (= day 1) "" "s"))))))))))
927
928(defun diary-yahrzeit (death-month death-day death-year &optional mark)
929  "Yahrzeit diary entry--entry applies if date is yahrzeit or the day before.
930Parameters are DEATH-MONTH, DEATH-DAY, DEATH-YEAR; the diary entry is assumed
931to be the name of the person.  Date of death is on the *civil* calendar;
932although the date of death is specified by the civil calendar, the proper
933Hebrew calendar yahrzeit is determined.  If `european-calendar-style' is t, the
934order of the parameters is changed to DEATH-DAY, DEATH-MONTH, DEATH-YEAR.
935
936An optional parameter MARK specifies a face or single-character string to
937use when highlighting the day in the calendar."
938  (let* ((h-date (calendar-hebrew-from-absolute
939                  (calendar-absolute-from-gregorian
940                   (if european-calendar-style
941                       (list death-day death-month death-year)
942		     (list death-month death-day death-year)))))
943         (h-month (extract-calendar-month h-date))
944         (h-day (extract-calendar-day h-date))
945         (h-year (extract-calendar-year h-date))
946         (d (calendar-absolute-from-gregorian date))
947         (yr (extract-calendar-year (calendar-hebrew-from-absolute d)))
948         (diff (- yr h-year))
949         (y (hebrew-calendar-yahrzeit h-date yr)))
950    (if (and (> diff 0) (or (= y d) (= y (1+ d))))
951        (cons mark
952	      (format "Yahrzeit of %s%s: %d%s anniversary"
953		      entry
954		      (if (= y d) "" " (evening)")
955		      diff
956		      (cond ((= (% diff 10) 1) "st")
957			    ((= (% diff 10) 2) "nd")
958			    ((= (% diff 10) 3) "rd")
959			    (t "th")))))))
960
961(defun diary-rosh-hodesh (&optional mark)
962  "Rosh Hodesh diary entry.
963Entry applies if date is Rosh Hodesh, the day before, or the Saturday before.
964
965An optional parameter MARK specifies a face or single-character string to
966use when highlighting the day in the calendar."
967  (let* ((d (calendar-absolute-from-gregorian date))
968         (h-date (calendar-hebrew-from-absolute d))
969         (h-month (extract-calendar-month h-date))
970         (h-day (extract-calendar-day h-date))
971         (h-year (extract-calendar-year h-date))
972         (leap-year (hebrew-calendar-leap-year-p h-year))
973         (last-day (hebrew-calendar-last-day-of-month h-month h-year))
974         (h-month-names
975          (if leap-year
976              calendar-hebrew-month-name-array-leap-year
977            calendar-hebrew-month-name-array-common-year))
978         (this-month (aref h-month-names (1- h-month)))
979         (h-yesterday (extract-calendar-day
980                       (calendar-hebrew-from-absolute (1- d)))))
981    (if (or (= h-day 30) (and (= h-day 1) (/= h-month 7)))
982        (cons mark
983	      (format
984	       "Rosh Hodesh %s"
985	       (if (= h-day 30)
986		   (format
987		    "%s (first day)"
988		    ;; next month must be in the same year since this
989		    ;; month can't be the last month of the year since
990		    ;; it has 30 days
991		    (aref h-month-names h-month))
992		 (if (= h-yesterday 30)
993		     (format "%s (second day)" this-month)
994		   this-month))))
995      (if (= (% d 7) 6)	;; Saturday--check for Shabbat Mevarchim
996          (cons mark
997		(cond ((and (> h-day 22) (/= h-month 6) (= 29 last-day))
998		       (format "Mevarchim Rosh Hodesh %s (%s)"
999			       (aref h-month-names
1000				     (if (= h-month
1001					    (hebrew-calendar-last-month-of-year
1002					     h-year))
1003					 0 h-month))
1004			       (aref calendar-day-name-array (- 29 h-day))))
1005		      ((and (< h-day 30) (> h-day 22) (= 30 last-day))
1006		       (format "Mevarchim Rosh Hodesh %s (%s-%s)"
1007			       (aref h-month-names h-month)
1008			       (if (= h-day 29)
1009				   "tomorrow"
1010				 (aref calendar-day-name-array (- 29 h-day)))
1011			       (aref calendar-day-name-array
1012				     (% (- 30 h-day) 7))))))
1013        (if (and (= h-day 29) (/= h-month 6))
1014            (cons mark
1015		  (format "Erev Rosh Hodesh %s"
1016			  (aref h-month-names
1017				(if (= h-month
1018				       (hebrew-calendar-last-month-of-year
1019					h-year))
1020				    0 h-month)))))))))
1021
1022(defvar hebrew-calendar-parashiot-names
1023["Bereshith"   "Noah"      "Lech L'cha" "Vayera"    "Hayei Sarah" "Toledoth"
1024 "Vayetze"     "Vayishlah" "Vayeshev"   "Mikketz"   "Vayiggash"   "Vayhi"
1025 "Shemoth"     "Vaera"     "Bo"         "Beshallah" "Yithro"      "Mishpatim"
1026 "Terumah"     "Tetzavveh" "Ki Tissa"   "Vayakhel"  "Pekudei"     "Vayikra"
1027 "Tzav"        "Shemini"   "Tazria"     "Metzora"   "Aharei Moth" "Kedoshim"
1028 "Emor"        "Behar"     "Behukkotai" "Bemidbar"  "Naso"       "Behaalot'cha"
1029 "Shelah L'cha" "Korah"    "Hukkath"    "Balak"     "Pinhas"      "Mattoth"
1030 "Masei"       "Devarim"   "Vaethanan"  "Ekev"      "Reeh"        "Shofetim"
1031 "Ki Tetze"    "Ki Tavo"   "Nitzavim"   "Vayelech"  "Haazinu"]
1032  "The names of the parashiot in the Torah.")
1033
1034(defun hebrew-calendar-parasha-name (p)
1035  "Name(s) corresponding to parasha P."
1036  (if (arrayp p);; combined parasha
1037      (format "%s/%s"
1038              (aref hebrew-calendar-parashiot-names (aref p 0))
1039              (aref hebrew-calendar-parashiot-names (aref p 1)))
1040    (aref hebrew-calendar-parashiot-names p)))
1041
1042(defun diary-parasha (&optional mark)
1043  "Parasha diary entry--entry applies if date is a Saturday.
1044
1045An optional parameter MARK specifies a face or single-character string to
1046use when highlighting the day in the calendar."
1047  (let ((d (calendar-absolute-from-gregorian date)))
1048    (if (= (% d 7) 6) ;;  Saturday
1049        (let*
1050            ((h-year (extract-calendar-year
1051                      (calendar-hebrew-from-absolute d)))
1052             (rosh-hashanah
1053              (calendar-absolute-from-hebrew (list 7 1 h-year)))
1054             (passover
1055              (calendar-absolute-from-hebrew (list 1 15 h-year)))
1056             (rosh-hashanah-day
1057              (aref calendar-day-name-array (% rosh-hashanah 7)))
1058             (passover-day
1059              (aref calendar-day-name-array (% passover 7)))
1060             (long-h (hebrew-calendar-long-heshvan-p h-year))
1061             (short-k (hebrew-calendar-short-kislev-p h-year))
1062             (type (cond ((and long-h (not short-k)) "complete")
1063                         ((and (not long-h) short-k) "incomplete")
1064                         (t "regular")))
1065             (year-format
1066              (symbol-value
1067               (intern (format "hebrew-calendar-year-%s-%s-%s" ;; keviah
1068                               rosh-hashanah-day type passover-day))))
1069             (first-saturday ;; of Hebrew year
1070              (calendar-dayname-on-or-before 6 (+ 6 rosh-hashanah)))
1071             (saturday ;; which Saturday of the Hebrew year
1072              (/ (- d first-saturday) 7))
1073             (parasha (aref year-format saturday)))
1074          (if parasha
1075              (cons mark
1076		    (format
1077		     "Parashat %s"
1078		     (if (listp parasha) ;; Israel differs from diaspora
1079			 (if (car parasha)
1080			     (format "%s (diaspora), %s (Israel)"
1081				     (hebrew-calendar-parasha-name (car parasha))
1082				     (hebrew-calendar-parasha-name (cdr parasha)))
1083			   (format "%s (Israel)"
1084				   (hebrew-calendar-parasha-name (cdr parasha))))
1085		       (hebrew-calendar-parasha-name parasha)))))))))
1086
1087;; The seven ordinary year types (keviot)
1088
1089(defconst hebrew-calendar-year-Saturday-incomplete-Sunday
1090  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1091    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1092    43 44 45 46 47 48 49 50]
1093  "The structure of the parashiot.
1094Hebrew year starts on Saturday, is `incomplete' (Heshvan and Kislev each have
109529 days), and has Passover start on Sunday.")
1096
1097(defconst hebrew-calendar-year-Saturday-complete-Tuesday
1098  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1099    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1100    43 44 45 46 47 48 49 [50 51]]
1101  "The structure of the parashiot.
1102Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
1103have 30 days), and has Passover start on Tuesday.")
1104
1105(defconst hebrew-calendar-year-Monday-incomplete-Tuesday
1106  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1107    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1108    43 44 45 46 47 48 49 [50 51]]
1109  "The structure of the parashiot.
1110Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
1111have 29 days), and has Passover start on Tuesday.")
1112
1113(defconst hebrew-calendar-year-Monday-complete-Thursday
1114  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1115   23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
1116   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1117  "The structure of the parashiot.
1118Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
111930 days), and has Passover start on Thursday.")
1120
1121(defconst hebrew-calendar-year-Tuesday-regular-Thursday
1122  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22]
1123   23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
1124   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1125  "The structure of the parashiot.
1126Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
1127Kislev has 30 days), and has Passover start on Thursday.")
1128
1129(defconst hebrew-calendar-year-Thursday-regular-Saturday
1130  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [21 22] 23
1131   24 nil (nil . 25) (25 . [26 27]) ([26 27] . [28 29]) ([28 29] . 30)
1132   (30 . 31) ([31 32] . 32) 33 34 35 36 37 38 39 40 [41 42] 43 44 45 46 47 48
1133   49 50]
1134  "The structure of the parashiot.
1135Hebrew year that starts on Thursday, is `regular' (Heshvan has 29 days and
1136Kislev has 30 days), and has Passover start on Saturday.")
1137
1138(defconst hebrew-calendar-year-Thursday-complete-Sunday
1139  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1140    23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1141    43 44 45 46 47 48 49 50]
1142  "The structure of the parashiot.
1143Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev each
1144have 30 days), and has Passover start on Sunday.")
1145
1146;; The seven leap year types (keviot)
1147
1148(defconst hebrew-calendar-year-Saturday-incomplete-Tuesday
1149  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1150    23 24 25 26 27 nil 28 29 30 31 32 33 34 35 36 37 38 39 40 [41 42]
1151    43 44 45 46 47 48 49 [50 51]]
1152  "The structure of the parashiot.
1153Hebrew year that starts on Saturday, is `incomplete' (Heshvan and Kislev each
1154have 29 days), and has Passover start on Tuesday.")
1155
1156(defconst hebrew-calendar-year-Saturday-complete-Thursday
1157  [nil 52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1158   23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1159   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1160  "The structure of the parashiot.
1161Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
1162have 30 days), and has Passover start on Thursday.")
1163
1164(defconst hebrew-calendar-year-Monday-incomplete-Thursday
1165  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1166   23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1167   (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1168  "The structure of the parashiot.
1169Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
1170have 29 days), and has Passover start on Thursday.")
1171
1172(defconst hebrew-calendar-year-Monday-complete-Saturday
1173  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1174   23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1175   (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1176   (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1177  "The structure of the parashiot.
1178Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
117930 days), and has Passover start on Saturday.")
1180
1181(defconst hebrew-calendar-year-Tuesday-regular-Saturday
1182  [51 52 nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1183   23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1184   (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1185   (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1186  "The structure of the parashiot.
1187Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
1188Kislev has 30 days), and has Passover start on Saturday.")
1189
1190(defconst hebrew-calendar-year-Thursday-incomplete-Sunday
1191  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1192    23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1193    43 44 45 46 47 48 49 50]
1194  "The structure of the parashiot.
1195Hebrew year that starts on Thursday, is `incomplete' (Heshvan and Kislev both
1196have 29 days), and has Passover start on Sunday.")
1197
1198(defconst hebrew-calendar-year-Thursday-complete-Tuesday
1199  [52 nil nil 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
1200    23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1201    43 44 45 46 47 48 49 [50 51]]
1202  "The structure of the parashiot.
1203Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev both
1204have 30 days), and has Passover start on Tuesday.")
1205
1206(provide 'cal-hebrew)
1207
1208;;; arch-tag: aaab6718-7712-42ac-a32d-28fe1f944f3c
1209;;; cal-hebrew.el ends here
1210