--- /dev/null
+;;; cal-hebrew.el --- calendar functions for the Islamic calendar.
+
+;; Copyright (C) 1995 Free Software Foundation, Inc.
+
+;; Author: Nachum Dershowi <nachum@cs.uiuc.edu>
+;; Edward M. Reingold <reingold@cs.uiuc.edu>
+;; Keywords: calendar
+;; Human-Keywords: Hebrew calendar, calendar, diary
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary:
+
+;; This collection of functions implements the features of calendar.el and
+;; diary.el that deal with the Hebrew calendar.
+
+;; Comments, corrections, and improvements should be sent to
+;; Edward M. Reingold Department of Computer Science
+;; (217) 333-6733 University of Illinois at Urbana-Champaign
+;; reingold@cs.uiuc.edu 1304 West Springfield Avenue
+;; Urbana, Illinois 61801
+
+;;; Code:
+
+(require 'calendar)
+
+(defun calendar-hebrew-from-absolute (date)
+ "Compute the Hebrew date (month day year) corresponding to absolute DATE.
+The absolute date is the number of days elapsed since the (imaginary)
+Gregorian date Sunday, December 31, 1 BC."
+ (let* ((greg-date (calendar-gregorian-from-absolute date))
+ (month (aref [9 10 11 12 1 2 3 4 7 7 7 8]
+ (1- (extract-calendar-month greg-date))))
+ (day)
+ (year (+ 3760 (extract-calendar-year greg-date))))
+ (while (>= date (calendar-absolute-from-hebrew (list 7 1 (1+ year))))
+ (setq year (1+ year)))
+ (let ((length (hebrew-calendar-last-month-of-year year)))
+ (while (> date
+ (calendar-absolute-from-hebrew
+ (list month
+ (hebrew-calendar-last-day-of-month month year)
+ year)))
+ (setq month (1+ (% month length)))))
+ (setq day (1+
+ (- date (calendar-absolute-from-hebrew (list month 1 year)))))
+ (list month day year)))
+
+(defun hebrew-calendar-leap-year-p (year)
+ "t if YEAR is a Hebrew calendar leap year."
+ (< (% (1+ (* 7 year)) 19) 7))
+
+(defun hebrew-calendar-last-month-of-year (year)
+ "The last month of the Hebrew calendar YEAR."
+ (if (hebrew-calendar-leap-year-p year)
+ 13
+ 12))
+
+(defun hebrew-calendar-last-day-of-month (month year)
+ "The last day of MONTH in YEAR."
+ (if (or (memq month (list 2 4 6 10 13))
+ (and (= month 12) (not (hebrew-calendar-leap-year-p year)))
+ (and (= month 8) (not (hebrew-calendar-long-heshvan-p year)))
+ (and (= month 9) (hebrew-calendar-short-kislev-p year)))
+ 29
+ 30))
+
+(defun hebrew-calendar-elapsed-days (year)
+ "Days from Sun. prior to start of Hebrew calendar to mean conjunction of Tishri of Hebrew YEAR."
+ (let* ((months-elapsed
+ (+ (* 235 (/ (1- year) 19));; Months in complete cycles so far.
+ (* 12 (% (1- year) 19)) ;; Regular months in this cycle
+ (/ (1+ (* 7 (% (1- year) 19))) 19)));; Leap months this cycle
+ (parts-elapsed (+ 204 (* 793 (% months-elapsed 1080))))
+ (hours-elapsed (+ 5
+ (* 12 months-elapsed)
+ (* 793 (/ months-elapsed 1080))
+ (/ parts-elapsed 1080)))
+ (parts ;; Conjunction parts
+ (+ (* 1080 (% hours-elapsed 24)) (% parts-elapsed 1080)))
+ (day ;; Conjunction day
+ (+ 1 (* 29 months-elapsed) (/ hours-elapsed 24)))
+ (alternative-day
+ (if (or (>= parts 19440) ;; If the new moon is at or after midday,
+ (and (= (% day 7) 2);; ...or is on a Tuesday...
+ (>= parts 9924) ;; at 9 hours, 204 parts or later...
+ (not (hebrew-calendar-leap-year-p year)));; of a
+ ;; common year,
+ (and (= (% day 7) 1);; ...or is on a Monday...
+ (>= parts 16789) ;; at 15 hours, 589 parts or later...
+ (hebrew-calendar-leap-year-p (1- year))));; at the end
+ ;; of a leap year
+ ;; Then postpone Rosh HaShanah one day
+ (1+ day)
+ ;; Else
+ day)))
+ (if ;; If Rosh HaShanah would occur on Sunday, Wednesday, or Friday
+ (memq (% alternative-day 7) (list 0 3 5))
+ ;; Then postpone it one (more) day and return
+ (1+ alternative-day)
+ ;; Else return
+ alternative-day)))
+
+(defun hebrew-calendar-days-in-year (year)
+ "Number of days in Hebrew YEAR."
+ (- (hebrew-calendar-elapsed-days (1+ year))
+ (hebrew-calendar-elapsed-days year)))
+
+(defun hebrew-calendar-long-heshvan-p (year)
+ "t if Heshvan is long in Hebrew YEAR."
+ (= (% (hebrew-calendar-days-in-year year) 10) 5))
+
+(defun hebrew-calendar-short-kislev-p (year)
+ "t if Kislev is short in Hebrew YEAR."
+ (= (% (hebrew-calendar-days-in-year year) 10) 3))
+
+(defun calendar-absolute-from-hebrew (date)
+ "Absolute date of Hebrew DATE.
+The absolute date is the number of days elapsed since the (imaginary)
+Gregorian date Sunday, December 31, 1 BC."
+ (let* ((month (extract-calendar-month date))
+ (day (extract-calendar-day date))
+ (year (extract-calendar-year date)))
+ (+ day ;; Days so far this month.
+ (if (< month 7);; before Tishri
+ ;; Then add days in prior months this year before and after Nisan
+ (+ (calendar-sum
+ m 7 (<= m (hebrew-calendar-last-month-of-year year))
+ (hebrew-calendar-last-day-of-month m year))
+ (calendar-sum
+ m 1 (< m month)
+ (hebrew-calendar-last-day-of-month m year)))
+ ;; Else add days in prior months this year
+ (calendar-sum
+ m 7 (< m month)
+ (hebrew-calendar-last-day-of-month m year)))
+ (hebrew-calendar-elapsed-days year);; Days in prior years.
+ -1373429))) ;; Days elapsed before absolute date 1.
+
+(defvar calendar-hebrew-month-name-array-common-year
+ ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
+ "Heshvan" "Kislev" "Teveth" "Shevat" "Adar"])
+
+(defvar calendar-hebrew-month-name-array-leap-year
+ ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
+ "Heshvan" "Kislev" "Teveth" "Shevat" "Adar I" "Adar II"])
+
+(defun calendar-hebrew-date-string (&optional date)
+ "String of Hebrew date before sunset of Gregorian DATE.
+Defaults to today's date if DATE is not given.
+Driven by the variable `calendar-date-display-form'."
+ (let* ((hebrew-date (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian
+ (or date (calendar-current-date)))))
+ (calendar-month-name-array
+ (if (hebrew-calendar-leap-year-p (extract-calendar-year hebrew-date))
+ calendar-hebrew-month-name-array-leap-year
+ calendar-hebrew-month-name-array-common-year)))
+ (calendar-date-string hebrew-date nil t)))
+
+(defun calendar-print-hebrew-date ()
+ "Show the Hebrew calendar equivalent of the date under the cursor."
+ (interactive)
+ (message "Hebrew date (until sunset): %s"
+ (calendar-hebrew-date-string (calendar-cursor-to-date t))))
+
+(defun hebrew-calendar-yahrzeit (death-date year)
+ "Absolute date of the anniversary of Hebrew DEATH-DATE in Hebrew YEAR."
+ (let* ((death-day (extract-calendar-day death-date))
+ (death-month (extract-calendar-month death-date))
+ (death-year (extract-calendar-year death-date)))
+ (cond
+ ;; If it's Heshvan 30 it depends on the first anniversary; if
+ ;; that was not Heshvan 30, use the day before Kislev 1.
+ ((and (= death-month 8)
+ (= death-day 30)
+ (not (hebrew-calendar-long-heshvan-p (1+ death-year))))
+ (1- (calendar-absolute-from-hebrew (list 9 1 year))))
+ ;; If it's Kislev 30 it depends on the first anniversary; if
+ ;; that was not Kislev 30, use the day before Teveth 1.
+ ((and (= death-month 9)
+ (= death-day 30)
+ (hebrew-calendar-short-kislev-p (1+ death-year)))
+ (1- (calendar-absolute-from-hebrew (list 10 1 year))))
+ ;; If it's Adar II, use the same day in last month of
+ ;; year (Adar or Adar II).
+ ((= death-month 13)
+ (calendar-absolute-from-hebrew
+ (list (hebrew-calendar-last-month-of-year year) death-day year)))
+ ;; If it's the 30th in Adar I and year is not a leap year
+ ;; (so Adar has only 29 days), use the last day in Shevat.
+ ((and (= death-day 30)
+ (= death-month 12)
+ (not (hebrew-calendar-leap-year-p year)))
+ (calendar-absolute-from-hebrew (list 11 30 year)))
+ ;; In all other cases, use the normal anniversary of the date of death.
+ (t (calendar-absolute-from-hebrew
+ (list death-month death-day year))))))
+
+(defun calendar-goto-hebrew-date (date &optional noecho)
+ "Move cursor to Hebrew DATE; echo Hebrew date unless NOECHO is t."
+ (interactive
+ (let* ((today (calendar-current-date))
+ (year (calendar-read
+ "Hebrew calendar year (>3760): "
+ '(lambda (x) (> x 3760))
+ (int-to-string
+ (extract-calendar-year
+ (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian today))))))
+ (month-array (if (hebrew-calendar-leap-year-p year)
+ calendar-hebrew-month-name-array-leap-year
+ calendar-hebrew-month-name-array-common-year))
+ (completion-ignore-case t)
+ (month (cdr (assoc
+ (capitalize
+ (completing-read
+ "Hebrew calendar month name: "
+ (mapcar 'list (append month-array nil))
+ (if (= year 3761)
+ '(lambda (x)
+ (let ((m (cdr
+ (assoc
+ (car x)
+ (calendar-make-alist
+ month-array)))))
+ (< 0
+ (calendar-absolute-from-hebrew
+ (list m
+ (hebrew-calendar-last-day-of-month
+ m year)
+ year))))))
+
+ t))
+ (calendar-make-alist month-array 1 'capitalize))))
+ (last (hebrew-calendar-last-day-of-month month year))
+ (first (if (and (= year 3761) (= month 10))
+ 18 1))
+ (day (calendar-read
+ (format "Hebrew calendar day (%d-%d): "
+ first last)
+ '(lambda (x) (and (<= first x) (<= x last))))))
+ (list (list month day year))))
+ (calendar-goto-date (calendar-gregorian-from-absolute
+ (calendar-absolute-from-hebrew date)))
+ (or noecho (calendar-print-hebrew-date)))
+
+(defun holiday-hebrew (month day string)
+ "Holiday on MONTH, DAY (Hebrew) called STRING.
+If MONTH, DAY (Hebrew) is visible, the value returned is corresponding
+Gregorian date in the form of the list (((month day year) STRING)). Returns
+nil if it is not visible in the current calendar window."
+ (if (memq displayed-month;; This test is only to speed things up a bit;
+ (list ;; it works fine without the test too.
+ (if (< 11 month) (- month 11) (+ month 1))
+ (if (< 10 month) (- month 10) (+ month 2))
+ (if (< 9 month) (- month 9) (+ month 3))
+ (if (< 8 month) (- month 8) (+ month 4))
+ (if (< 7 month) (- month 7) (+ month 5))))
+ (let ((m1 displayed-month)
+ (y1 displayed-year)
+ (m2 displayed-month)
+ (y2 displayed-year)
+ (year))
+ (increment-calendar-month m1 y1 -1)
+ (increment-calendar-month m2 y2 1)
+ (let* ((start-date (calendar-absolute-from-gregorian
+ (list m1 1 y1)))
+ (end-date (calendar-absolute-from-gregorian
+ (list m2 (calendar-last-day-of-month m2 y2) y2)))
+ (hebrew-start (calendar-hebrew-from-absolute start-date))
+ (hebrew-end (calendar-hebrew-from-absolute end-date))
+ (hebrew-y1 (extract-calendar-year hebrew-start))
+ (hebrew-y2 (extract-calendar-year hebrew-end)))
+ (setq year (if (< 6 month) hebrew-y2 hebrew-y1))
+ (let ((date (calendar-gregorian-from-absolute
+ (calendar-absolute-from-hebrew
+ (list month day year)))))
+ (if (calendar-date-is-visible-p date)
+ (list (list date string))))))))
+
+(defun holiday-rosh-hashanah-etc ()
+ "List of dates related to Rosh Hashanah, as visible in calendar window."
+ (if (or (< displayed-month 8)
+ (> displayed-month 11))
+ nil;; None of the dates is visible
+ (let* ((abs-r-h (calendar-absolute-from-hebrew
+ (list 7 1 (+ displayed-year 3761))))
+ (mandatory
+ (list
+ (list (calendar-gregorian-from-absolute abs-r-h)
+ (format "Rosh HaShanah %d" (+ 3761 displayed-year)))
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 9))
+ "Yom Kippur")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 14))
+ "Sukkot")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 21))
+ "Shemini Atzeret")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 22))
+ "Simchat Torah")))
+ (optional
+ (list
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 (- abs-r-h 4)))
+ "Selichot (night)")
+ (list (calendar-gregorian-from-absolute (1- abs-r-h))
+ "Erev Rosh HaShannah")
+ (list (calendar-gregorian-from-absolute (1+ abs-r-h))
+ "Rosh HaShanah (second day)")
+ (list (calendar-gregorian-from-absolute
+ (if (= (% abs-r-h 7) 4) (+ abs-r-h 3) (+ abs-r-h 2)))
+ "Tzom Gedaliah")
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 (+ 7 abs-r-h)))
+ "Shabbat Shuvah")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 8))
+ "Erev Yom Kippur")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 13))
+ "Erev Sukkot")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 15))
+ "Sukkot (second day)")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 16))
+ "Hol Hamoed Sukkot (first day)")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 17))
+ "Hol Hamoed Sukkot (second day)")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 18))
+ "Hol Hamoed Sukkot (third day)")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 19))
+ "Hol Hamoed Sukkot (fourth day)")
+ (list (calendar-gregorian-from-absolute (+ abs-r-h 20))
+ "Hoshannah Rabbah")))
+ (output-list
+ (filter-visible-calendar-holidays mandatory)))
+ (if all-hebrew-calendar-holidays
+ (setq output-list
+ (append
+ (filter-visible-calendar-holidays optional)
+ output-list)))
+ output-list)))
+
+(defun holiday-hanukkah ()
+ "List of dates related to Hanukkah, as visible in calendar window."
+ (if (memq displayed-month;; This test is only to speed things up a bit;
+ '(10 11 12 1 2));; it works fine without the test too.
+ (let ((m displayed-month)
+ (y displayed-year))
+ (increment-calendar-month m y 1)
+ (let* ((h-y (extract-calendar-year
+ (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian
+ (list m (calendar-last-day-of-month m y) y)))))
+ (abs-h (calendar-absolute-from-hebrew (list 9 25 h-y))))
+ (filter-visible-calendar-holidays
+ (list
+ (list (calendar-gregorian-from-absolute (1- abs-h))
+ "Erev Hanukkah")
+ (list (calendar-gregorian-from-absolute abs-h)
+ "Hanukkah (first day)")
+ (list (calendar-gregorian-from-absolute (1+ abs-h))
+ "Hanukkah (second day)")
+ (list (calendar-gregorian-from-absolute (+ abs-h 2))
+ "Hanukkah (third day)")
+ (list (calendar-gregorian-from-absolute (+ abs-h 3))
+ "Hanukkah (fourth day)")
+ (list (calendar-gregorian-from-absolute (+ abs-h 4))
+ "Hanukkah (fifth day)")
+ (list (calendar-gregorian-from-absolute (+ abs-h 5))
+ "Hanukkah (sixth day)")
+ (list (calendar-gregorian-from-absolute (+ abs-h 6))
+ "Hanukkah (seventh day)")
+ (list (calendar-gregorian-from-absolute (+ abs-h 7))
+ "Hanukkah (eighth day)")))))))
+
+(defun holiday-passover-etc ()
+ "List of dates related to Passover, as visible in calendar window."
+ (if (< 7 displayed-month)
+ nil;; None of the dates is visible
+ (let* ((abs-p (calendar-absolute-from-hebrew
+ (list 1 15 (+ displayed-year 3760))))
+ (mandatory
+ (list
+ (list (calendar-gregorian-from-absolute abs-p)
+ "Passover")
+ (list (calendar-gregorian-from-absolute (+ abs-p 50))
+ "Shavuot")))
+ (optional
+ (list
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 (- abs-p 43)))
+ "Shabbat Shekalim")
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 (- abs-p 30)))
+ "Shabbat Zachor")
+ (list (calendar-gregorian-from-absolute
+ (if (= (% abs-p 7) 2) (- abs-p 33) (- abs-p 31)))
+ "Fast of Esther")
+ (list (calendar-gregorian-from-absolute (- abs-p 31))
+ "Erev Purim")
+ (list (calendar-gregorian-from-absolute (- abs-p 30))
+ "Purim")
+ (list (calendar-gregorian-from-absolute
+ (if (zerop (% abs-p 7)) (- abs-p 28) (- abs-p 29)))
+ "Shushan Purim")
+ (list (calendar-gregorian-from-absolute
+ (- (calendar-dayname-on-or-before 6 (- abs-p 14)) 7))
+ "Shabbat Parah")
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 (- abs-p 14)))
+ "Shabbat HaHodesh")
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 (1- abs-p)))
+ "Shabbat HaGadol")
+ (list (calendar-gregorian-from-absolute (1- abs-p))
+ "Erev Passover")
+ (list (calendar-gregorian-from-absolute (1+ abs-p))
+ "Passover (second day)")
+ (list (calendar-gregorian-from-absolute (+ abs-p 2))
+ "Hol Hamoed Passover (first day)")
+ (list (calendar-gregorian-from-absolute (+ abs-p 3))
+ "Hol Hamoed Passover (second day)")
+ (list (calendar-gregorian-from-absolute (+ abs-p 4))
+ "Hol Hamoed Passover (third day)")
+ (list (calendar-gregorian-from-absolute (+ abs-p 5))
+ "Hol Hamoed Passover (fourth day)")
+ (list (calendar-gregorian-from-absolute (+ abs-p 6))
+ "Passover (seventh day)")
+ (list (calendar-gregorian-from-absolute (+ abs-p 7))
+ "Passover (eighth day)")
+ (list (calendar-gregorian-from-absolute (+ abs-p 12))
+ "Yom HaShoah")
+ (list (calendar-gregorian-from-absolute
+ (if (zerop (% abs-p 7))
+ (+ abs-p 18)
+ (if (= (% abs-p 7) 6)
+ (+ abs-p 19)
+ (+ abs-p 20))))
+ "Yom HaAtzma'ut")
+ (list (calendar-gregorian-from-absolute (+ abs-p 33))
+ "Lag BaOmer")
+ (list (calendar-gregorian-from-absolute (+ abs-p 43))
+ "Yom Yerushalim")
+ (list (calendar-gregorian-from-absolute (+ abs-p 49))
+ "Erev Shavuot")
+ (list (calendar-gregorian-from-absolute (+ abs-p 51))
+ "Shavuot (second day)")))
+ (output-list
+ (filter-visible-calendar-holidays mandatory)))
+ (if all-hebrew-calendar-holidays
+ (setq output-list
+ (append
+ (filter-visible-calendar-holidays optional)
+ output-list)))
+ output-list)))
+
+(defun holiday-tisha-b-av-etc ()
+ "List of dates around Tisha B'Av, as visible in calendar window."
+ (if (or (< displayed-month 5)
+ (> displayed-month 9))
+ nil;; None of the dates is visible
+ (let* ((abs-t-a (calendar-absolute-from-hebrew
+ (list 5 9 (+ displayed-year 3760)))))
+
+ (filter-visible-calendar-holidays
+ (list
+ (list (calendar-gregorian-from-absolute
+ (if (= (% abs-t-a 7) 6) (- abs-t-a 20) (- abs-t-a 21)))
+ "Tzom Tammuz")
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 abs-t-a))
+ "Shabbat Hazon")
+ (list (calendar-gregorian-from-absolute
+ (if (= (% abs-t-a 7) 6) (1+ abs-t-a) abs-t-a))
+ "Tisha B'Av")
+ (list (calendar-gregorian-from-absolute
+ (calendar-dayname-on-or-before 6 (+ abs-t-a 7)))
+ "Shabbat Nahamu"))))))
+
+(defun list-hebrew-diary-entries ()
+ "Add any Hebrew date entries from the diary file to `diary-entries-list'.
+Hebrew date diary entries must be prefaced by `hebrew-diary-entry-symbol'
+\(normally an `H'). The same diary date forms govern the style of the Hebrew
+calendar entries, except that the Hebrew month names must be spelled in full.
+The Hebrew months are numbered from 1 to 13 with Nisan being 1, 12 being
+Adar I and 13 being Adar II; you must use `Adar I' if you want Adar of a
+common Hebrew year. If a Hebrew date diary entry begins with a
+`diary-nonmarking-symbol', the entry will appear in the diary listing, but will
+not be marked in the calendar. This function is provided for use with the
+`nongregorian-diary-listing-hook'."
+ (if (< 0 number)
+ (let ((buffer-read-only nil)
+ (diary-modified (buffer-modified-p))
+ (gdate original-date)
+ (mark (regexp-quote diary-nonmarking-symbol)))
+ (calendar-for-loop i from 1 to number do
+ (let* ((d diary-date-forms)
+ (hdate (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian gdate)))
+ (month (extract-calendar-month hdate))
+ (day (extract-calendar-day hdate))
+ (year (extract-calendar-year hdate)))
+ (while d
+ (let*
+ ((date-form (if (equal (car (car d)) 'backup)
+ (cdr (car d))
+ (car d)))
+ (backup (equal (car (car d)) 'backup))
+ (dayname
+ (concat
+ (calendar-day-name gdate) "\\|"
+ (substring (calendar-day-name gdate) 0 3) ".?"))
+ (calendar-month-name-array
+ calendar-hebrew-month-name-array-leap-year)
+ (monthname
+ (concat
+ "\\*\\|"
+ (calendar-month-name month)))
+ (month (concat "\\*\\|0*" (int-to-string month)))
+ (day (concat "\\*\\|0*" (int-to-string day)))
+ (year
+ (concat
+ "\\*\\|0*" (int-to-string year)
+ (if abbreviated-calendar-year
+ (concat "\\|" (int-to-string (% year 100)))
+ "")))
+ (regexp
+ (concat
+ "\\(\\`\\|\^M\\|\n\\)" mark "?"
+ (regexp-quote hebrew-diary-entry-symbol)
+ "\\("
+ (mapconcat 'eval date-form "\\)\\(")
+ "\\)"))
+ (case-fold-search t))
+ (goto-char (point-min))
+ (while (re-search-forward regexp nil t)
+ (if backup (re-search-backward "\\<" nil t))
+ (if (and (or (char-equal (preceding-char) ?\^M)
+ (char-equal (preceding-char) ?\n))
+ (not (looking-at " \\|\^I")))
+ ;; Diary entry that consists only of date.
+ (backward-char 1)
+ ;; Found a nonempty diary entry--make it visible and
+ ;; add it to the list.
+ (let ((entry-start (point))
+ (date-start))
+ (re-search-backward "\^M\\|\n\\|\\`")
+ (setq date-start (point))
+ (re-search-forward "\^M\\|\n" nil t 2)
+ (while (looking-at " \\|\^I")
+ (re-search-forward "\^M\\|\n" nil t))
+ (backward-char 1)
+ (subst-char-in-region date-start (point) ?\^M ?\n t)
+ (add-to-diary-list
+ gdate (buffer-substring entry-start (point)))))))
+ (setq d (cdr d))))
+ (setq gdate
+ (calendar-gregorian-from-absolute
+ (1+ (calendar-absolute-from-gregorian gdate)))))
+ (set-buffer-modified-p diary-modified))
+ (goto-char (point-min))))
+
+(defun mark-hebrew-diary-entries ()
+ "Mark days in the calendar window that have Hebrew date diary entries.
+Each entry in diary-file (or included files) visible in the calendar window
+is marked. Hebrew date entries are prefaced by a hebrew-diary-entry-symbol
+\(normally an `H'). The same diary-date-forms govern the style of the Hebrew
+calendar entries, except that the Hebrew month names must be spelled in full.
+The Hebrew months are numbered from 1 to 13 with Nisan being 1, 12 being
+Adar I and 13 being Adar II; you must use `Adar I' if you want Adar of a
+common Hebrew year. Hebrew date diary entries that begin with a
+diary-nonmarking symbol will not be marked in the calendar. This function
+is provided for use as part of the nongregorian-diary-marking-hook."
+ (let ((d diary-date-forms))
+ (while d
+ (let*
+ ((date-form (if (equal (car (car d)) 'backup)
+ (cdr (car d))
+ (car d)));; ignore 'backup directive
+ (dayname (diary-name-pattern calendar-day-name-array))
+ (monthname
+ (concat
+ (diary-name-pattern calendar-hebrew-month-name-array-leap-year t)
+ "\\|\\*"))
+ (month "[0-9]+\\|\\*")
+ (day "[0-9]+\\|\\*")
+ (year "[0-9]+\\|\\*")
+ (l (length date-form))
+ (d-name-pos (- l (length (memq 'dayname date-form))))
+ (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos)))
+ (m-name-pos (- l (length (memq 'monthname date-form))))
+ (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos)))
+ (d-pos (- l (length (memq 'day date-form))))
+ (d-pos (if (/= l d-pos) (+ 2 d-pos)))
+ (m-pos (- l (length (memq 'month date-form))))
+ (m-pos (if (/= l m-pos) (+ 2 m-pos)))
+ (y-pos (- l (length (memq 'year date-form))))
+ (y-pos (if (/= l y-pos) (+ 2 y-pos)))
+ (regexp
+ (concat
+ "\\(\\`\\|\^M\\|\n\\)"
+ (regexp-quote hebrew-diary-entry-symbol)
+ "\\("
+ (mapconcat 'eval date-form "\\)\\(")
+ "\\)"))
+ (case-fold-search t))
+ (goto-char (point-min))
+ (while (re-search-forward regexp nil t)
+ (let* ((dd-name
+ (if d-name-pos
+ (buffer-substring
+ (match-beginning d-name-pos)
+ (match-end d-name-pos))))
+ (mm-name
+ (if m-name-pos
+ (buffer-substring
+ (match-beginning m-name-pos)
+ (match-end m-name-pos))))
+ (mm (string-to-int
+ (if m-pos
+ (buffer-substring
+ (match-beginning m-pos)
+ (match-end m-pos))
+ "")))
+ (dd (string-to-int
+ (if d-pos
+ (buffer-substring
+ (match-beginning d-pos)
+ (match-end d-pos))
+ "")))
+ (y-str (if y-pos
+ (buffer-substring
+ (match-beginning y-pos)
+ (match-end y-pos))))
+ (yy (if (not y-str)
+ 0
+ (if (and (= (length y-str) 2)
+ abbreviated-calendar-year)
+ (let* ((current-y
+ (extract-calendar-year
+ (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian
+ (calendar-current-date)))))
+ (y (+ (string-to-int y-str)
+ (* 100 (/ current-y 100)))))
+ (if (> (- y current-y) 50)
+ (- y 100)
+ (if (> (- current-y y) 50)
+ (+ y 100)
+ y)))
+ (string-to-int y-str)))))
+ (if dd-name
+ (mark-calendar-days-named
+ (cdr (assoc (capitalize (substring dd-name 0 3))
+ (calendar-make-alist
+ calendar-day-name-array
+ 0
+ '(lambda (x) (substring x 0 3))))))
+ (if mm-name
+ (if (string-equal mm-name "*")
+ (setq mm 0)
+ (setq
+ mm
+ (cdr
+ (assoc
+ (capitalize mm-name)
+ (calendar-make-alist
+ calendar-hebrew-month-name-array-leap-year))))))
+ (mark-hebrew-calendar-date-pattern mm dd yy)))))
+ (setq d (cdr d)))))
+
+(defun mark-hebrew-calendar-date-pattern (month day year)
+ "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR.
+A value of 0 in any position is a wildcard."
+ (save-excursion
+ (set-buffer calendar-buffer)
+ (if (and (/= 0 month) (/= 0 day))
+ (if (/= 0 year)
+ ;; Fully specified Hebrew date.
+ (let ((date (calendar-gregorian-from-absolute
+ (calendar-absolute-from-hebrew
+ (list month day year)))))
+ (if (calendar-date-is-visible-p date)
+ (mark-visible-calendar-date date)))
+ ;; Month and day in any year--this taken from the holiday stuff.
+ (if (memq displayed-month;; This test is only to speed things up a
+ (list ;; bit; it works fine without the test too.
+ (if (< 11 month) (- month 11) (+ month 1))
+ (if (< 10 month) (- month 10) (+ month 2))
+ (if (< 9 month) (- month 9) (+ month 3))
+ (if (< 8 month) (- month 8) (+ month 4))
+ (if (< 7 month) (- month 7) (+ month 5))))
+ (let ((m1 displayed-month)
+ (y1 displayed-year)
+ (m2 displayed-month)
+ (y2 displayed-year)
+ (year))
+ (increment-calendar-month m1 y1 -1)
+ (increment-calendar-month m2 y2 1)
+ (let* ((start-date (calendar-absolute-from-gregorian
+ (list m1 1 y1)))
+ (end-date (calendar-absolute-from-gregorian
+ (list m2
+ (calendar-last-day-of-month m2 y2)
+ y2)))
+ (hebrew-start
+ (calendar-hebrew-from-absolute start-date))
+ (hebrew-end (calendar-hebrew-from-absolute end-date))
+ (hebrew-y1 (extract-calendar-year hebrew-start))
+ (hebrew-y2 (extract-calendar-year hebrew-end)))
+ (setq year (if (< 6 month) hebrew-y2 hebrew-y1))
+ (let ((date (calendar-gregorian-from-absolute
+ (calendar-absolute-from-hebrew
+ (list month day year)))))
+ (if (calendar-date-is-visible-p date)
+ (mark-visible-calendar-date date)))))))
+ ;; Not one of the simple cases--check all visible dates for match.
+ ;; Actually, the following code takes care of ALL of the cases, but
+ ;; it's much too slow to be used for the simple (common) cases.
+ (let ((m displayed-month)
+ (y displayed-year)
+ (first-date)
+ (last-date))
+ (increment-calendar-month m y -1)
+ (setq first-date
+ (calendar-absolute-from-gregorian
+ (list m 1 y)))
+ (increment-calendar-month m y 2)
+ (setq last-date
+ (calendar-absolute-from-gregorian
+ (list m (calendar-last-day-of-month m y) y)))
+ (calendar-for-loop date from first-date to last-date do
+ (let* ((h-date (calendar-hebrew-from-absolute date))
+ (h-month (extract-calendar-month h-date))
+ (h-day (extract-calendar-day h-date))
+ (h-year (extract-calendar-year h-date)))
+ (and (or (zerop month)
+ (= month h-month))
+ (or (zerop day)
+ (= day h-day))
+ (or (zerop year)
+ (= year h-year))
+ (mark-visible-calendar-date
+ (calendar-gregorian-from-absolute date)))))))))
+
+(defun insert-hebrew-diary-entry (arg)
+ "Insert a diary entry.
+For the Hebrew date corresponding to the date indicated by point.
+Prefix arg will make the entry nonmarking."
+ (interactive "P")
+ (let* ((calendar-month-name-array
+ calendar-hebrew-month-name-array-leap-year))
+ (make-diary-entry
+ (concat
+ hebrew-diary-entry-symbol
+ (calendar-date-string
+ (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian
+ (calendar-cursor-to-date t)))
+ nil t))
+ arg)))
+
+(defun insert-monthly-hebrew-diary-entry (arg)
+ "Insert a monthly diary entry.
+For the day of the Hebrew month corresponding to the date indicated by point.
+Prefix arg will make the entry nonmarking."
+ (interactive "P")
+ (let* ((calendar-date-display-form
+ (if european-calendar-style '(day " * ") '("* " day )))
+ (calendar-month-name-array
+ calendar-hebrew-month-name-array-leap-year))
+ (make-diary-entry
+ (concat
+ hebrew-diary-entry-symbol
+ (calendar-date-string
+ (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian
+ (calendar-cursor-to-date t)))))
+ arg)))
+
+(defun insert-yearly-hebrew-diary-entry (arg)
+ "Insert an annual diary entry.
+For the day of the Hebrew year corresponding to the date indicated by point.
+Prefix arg will make the entry nonmarking."
+ (interactive "P")
+ (let* ((calendar-date-display-form
+ (if european-calendar-style
+ '(day " " monthname)
+ '(monthname " " day)))
+ (calendar-month-name-array
+ calendar-hebrew-month-name-array-leap-year))
+ (make-diary-entry
+ (concat
+ hebrew-diary-entry-symbol
+ (calendar-date-string
+ (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian
+ (calendar-cursor-to-date t)))))
+ arg)))
+
+;;;###autoload
+(defun list-yahrzeit-dates (death-date start-year end-year)
+ "List Yahrzeit dates for *Gregorian* DEATH-DATE from START-YEAR to END-YEAR.
+When called interactively from the calendar window, the date of death is taken
+from the cursor position."
+ (interactive
+ (let* ((death-date
+ (if (equal (current-buffer) (get-buffer calendar-buffer))
+ (calendar-cursor-to-date)
+ (let* ((today (calendar-current-date))
+ (year (calendar-read
+ "Year of death (>0): "
+ '(lambda (x) (> x 0))
+ (int-to-string (extract-calendar-year today))))
+ (month-array calendar-month-name-array)
+ (completion-ignore-case t)
+ (month (cdr (assoc
+ (capitalize
+ (completing-read
+ "Month of death (name): "
+ (mapcar 'list (append month-array nil))
+ nil t))
+ (calendar-make-alist
+ month-array 1 'capitalize))))
+ (last (calendar-last-day-of-month month year))
+ (day (calendar-read
+ (format "Day of death (1-%d): " last)
+ '(lambda (x) (and (< 0 x) (<= x last))))))
+ (list month day year))))
+ (death-year (extract-calendar-year death-date))
+ (start-year (calendar-read
+ (format "Starting year of Yahrzeit table (>%d): "
+ death-year)
+ '(lambda (x) (> x death-year))
+ (int-to-string (1+ death-year))))
+ (end-year (calendar-read
+ (format "Ending year of Yahrzeit table (>=%d): "
+ start-year)
+ '(lambda (x) (>= x start-year)))))
+ (list death-date start-year end-year)))
+ (message "Computing yahrzeits...")
+ (let* ((yahrzeit-buffer "*Yahrzeits*")
+ (h-date (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian death-date)))
+ (h-month (extract-calendar-month h-date))
+ (h-day (extract-calendar-day h-date))
+ (h-year (extract-calendar-year h-date)))
+ (set-buffer (get-buffer-create yahrzeit-buffer))
+ (setq buffer-read-only nil)
+ (calendar-set-mode-line
+ (format "Yahrzeit dates for %s = %s"
+ (calendar-date-string death-date)
+ (let ((calendar-month-name-array
+ (if (hebrew-calendar-leap-year-p h-year)
+ calendar-hebrew-month-name-array-leap-year
+ calendar-hebrew-month-name-array-common-year)))
+ (calendar-date-string h-date nil t))))
+ (erase-buffer)
+ (goto-char (point-min))
+ (calendar-for-loop i from start-year to end-year do
+ (insert
+ (calendar-date-string
+ (calendar-gregorian-from-absolute
+ (hebrew-calendar-yahrzeit
+ h-date
+ (extract-calendar-year
+ (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian (list 1 1 i))))))) "\n"))
+ (goto-char (point-min))
+ (set-buffer-modified-p nil)
+ (setq buffer-read-only t)
+ (display-buffer yahrzeit-buffer)
+ (message "Computing yahrzeits...done")))
+
+(defun diary-hebrew-date ()
+ "Hebrew calendar equivalent of date diary entry."
+ (format "Hebrew date (until sunset): %s" (calendar-hebrew-date-string date)))
+
+(defun diary-omer ()
+ "Omer count diary entry.
+Entry applies if date is within 50 days after Passover."
+ (let* ((passover
+ (calendar-absolute-from-hebrew
+ (list 1 15 (+ (extract-calendar-year date) 3760))))
+ (omer (- (calendar-absolute-from-gregorian date) passover))
+ (week (/ omer 7))
+ (day (% omer 7)))
+ (if (and (> omer 0) (< omer 50))
+ (format "Day %d%s of the omer (until sunset)"
+ omer
+ (if (zerop week)
+ ""
+ (format ", that is, %d week%s%s"
+ week
+ (if (= week 1) "" "s")
+ (if (zerop day)
+ ""
+ (format " and %d day%s"
+ day (if (= day 1) "" "s")))))))))
+
+(defun diary-yahrzeit (death-month death-day death-year)
+ "Yahrzeit diary entry--entry applies if date is yahrzeit or the day before.
+Parameters are DEATH-MONTH, DEATH-DAY, DEATH-YEAR; the diary entry is assumed
+to be the name of the person. Date of death is on the *civil* calendar;
+although the date of death is specified by the civil calendar, the proper
+Hebrew calendar yahrzeit is determined. If `european-calendar-style' is t, the
+order of the parameters is changed to DEATH-DAY, DEATH-MONTH, DEATH-YEAR."
+ (let* ((h-date (calendar-hebrew-from-absolute
+ (calendar-absolute-from-gregorian
+ (if european-calendar-style
+ (list death-day death-month death-year)
+ (list death-month death-day death-year)))))
+ (h-month (extract-calendar-month h-date))
+ (h-day (extract-calendar-day h-date))
+ (h-year (extract-calendar-year h-date))
+ (d (calendar-absolute-from-gregorian date))
+ (yr (extract-calendar-year (calendar-hebrew-from-absolute d)))
+ (diff (- yr h-year))
+ (y (hebrew-calendar-yahrzeit h-date yr)))
+ (if (and (> diff 0) (or (= y d) (= y (1+ d))))
+ (format "Yahrzeit of %s%s: %d%s anniversary"
+ entry
+ (if (= y d) "" " (evening)")
+ diff
+ (cond ((= (% diff 10) 1) "st")
+ ((= (% diff 10) 2) "nd")
+ ((= (% diff 10) 3) "rd")
+ (t "th"))))))
+
+(defun diary-rosh-hodesh ()
+ "Rosh Hodesh diary entry.
+Entry applies if date is Rosh Hodesh, the day before, or the Saturday before."
+ (let* ((d (calendar-absolute-from-gregorian date))
+ (h-date (calendar-hebrew-from-absolute d))
+ (h-month (extract-calendar-month h-date))
+ (h-day (extract-calendar-day h-date))
+ (h-year (extract-calendar-year h-date))
+ (leap-year (hebrew-calendar-leap-year-p h-year))
+ (last-day (hebrew-calendar-last-day-of-month h-month h-year))
+ (h-month-names
+ (if leap-year
+ calendar-hebrew-month-name-array-leap-year
+ calendar-hebrew-month-name-array-common-year))
+ (this-month (aref h-month-names (1- h-month)))
+ (h-yesterday (extract-calendar-day
+ (calendar-hebrew-from-absolute (1- d)))))
+ (if (or (= h-day 30) (and (= h-day 1) (/= h-month 7)))
+ (format
+ "Rosh Hodesh %s"
+ (if (= h-day 30)
+ (format
+ "%s (first day)"
+ ;; next month must be in the same year since this
+ ;; month can't be the last month of the year since
+ ;; it has 30 days
+ (aref h-month-names h-month))
+ (if (= h-yesterday 30)
+ (format "%s (second day)" this-month)
+ this-month)))
+ (if (= (% d 7) 6);; Saturday--check for Shabbat Mevarhim
+ (cond ((and (> h-day 22) (/= h-month 6) (= 29 last-day))
+ (format "Mevarhim Rosh Hodesh %s (%s)"
+ (aref h-month-names
+ (if (= h-month
+ (hebrew-calendar-last-month-of-year
+ h-year))
+ 0 h-month))
+ (aref calendar-day-name-array (- 29 h-day))))
+ ((and (< h-day 30) (> h-day 22) (= 30 last-day))
+ (format "Mevarhim Rosh Hodesh %s (%s-%s)"
+ (aref h-month-names h-month)
+ (if (= h-day 29)
+ "tomorrow"
+ (aref calendar-day-name-array (- 29 h-day)))
+ (aref calendar-day-name-array
+ (% (- 30 h-day) 7)))))
+ (if (and (= h-day 29) (/= h-month 6))
+ (format "Erev Rosh Hodesh %s"
+ (aref h-month-names
+ (if (= h-month
+ (hebrew-calendar-last-month-of-year
+ h-year))
+ 0 h-month))))))))
+
+(defun diary-parasha ()
+ "Parasha diary entry--entry applies if date is a Saturday."
+ (let ((d (calendar-absolute-from-gregorian date)))
+ (if (= (% d 7) 6);; Saturday
+ (let*
+ ((h-year (extract-calendar-year
+ (calendar-hebrew-from-absolute d)))
+ (rosh-hashannah
+ (calendar-absolute-from-hebrew (list 7 1 h-year)))
+ (passover
+ (calendar-absolute-from-hebrew (list 1 15 h-year)))
+ (rosh-hashannah-day
+ (aref calendar-day-name-array (% rosh-hashannah 7)))
+ (passover-day
+ (aref calendar-day-name-array (% passover 7)))
+ (long-h (hebrew-calendar-long-heshvan-p h-year))
+ (short-k (hebrew-calendar-short-kislev-p h-year))
+ (type (cond ((and long-h (not short-k)) "complete")
+ ((and (not long-h) short-k) "incomplete")
+ (t "regular")))
+ (year-format
+ (symbol-value
+ (intern (format "hebrew-calendar-year-%s-%s-%s";; keviah
+ rosh-hashannah-day type passover-day))))
+ (first-saturday;; of Hebrew year
+ (calendar-dayname-on-or-before 6 (+ 6 rosh-hashannah)))
+ (saturday;; which Saturday of the Hebrew year
+ (/ (- d first-saturday) 7))
+ (parasha (aref year-format saturday)))
+ (if parasha
+ (format
+ "Parashat %s"
+ (if (listp parasha);; Israel differs from diaspora
+ (if (car parasha)
+ (format "%s (diaspora), %s (Israel)"
+ (hebrew-calendar-parasha-name (car parasha))
+ (hebrew-calendar-parasha-name (cdr parasha)))
+ (format "%s (Israel)"
+ (hebrew-calendar-parasha-name (cdr parasha))))
+ (hebrew-calendar-parasha-name parasha))))))))
+
+(defvar hebrew-calendar-parashiot-names
+["Bereshith" "Noah" "Lech L'cha" "Vayera" "Hayei Sarah" "Toledoth"
+ "Vayetze" "Vayishlah" "Vayeshev" "Mikketz" "Vayiggash" "Vayhi"
+ "Shemoth" "Vaera" "Bo" "Beshallah" "Yithro" "Mishpatim"
+ "Terumah" "Tetzavveh" "Ki Tissa" "Vayakhel" "Pekudei" "Vayikra"
+ "Tzav" "Shemini" "Tazria" "Metzora" "Aharei Moth" "Kedoshim"
+ "Emor" "Behar" "Behukkotai" "Bemidbar" "Naso" "Behaalot'cha"
+ "Shelah L'cha" "Korah" "Hukkath" "Balak" "Pinhas" "Mattoth"
+ "Masei" "Devarim" "Vaethanan" "Ekev" "Reeh" "Shofetim"
+ "Ki Tetze" "Ki Tavo" "Nitzavim" "Vayelech" "Haazinu"]
+ "The names of the parashiot in the Torah.")
+
+;; The seven ordinary year types (keviot)
+
+(defconst hebrew-calendar-year-Saturday-incomplete-Sunday
+ [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]
+ 23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
+ 43 44 45 46 47 48 49 50]
+ "The structure of the parashiot.
+Hebrew year starts on Saturday, is `incomplete' (Heshvan and Kislev each have
+29 days), and has Passover start on Sunday.")
+
+(defconst hebrew-calendar-year-Saturday-complete-Tuesday
+ [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]
+ 23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
+ 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
+have 30 days), and has Passover start on Tuesday.")
+
+(defconst hebrew-calendar-year-Monday-incomplete-Tuesday
+ [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]
+ 23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
+ 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
+have 29 days), and has Passover start on Tuesday.")
+
+(defconst hebrew-calendar-year-Monday-complete-Thursday
+ [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]
+ 23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
+ (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
+30 days), and has Passover start on Thursday.")
+
+(defconst hebrew-calendar-year-Tuesday-regular-Thursday
+ [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]
+ 23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
+ (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
+Kislev has 30 days), and has Passover start on Thursday.")
+
+(defconst hebrew-calendar-year-Thursday-regular-Saturday
+ [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
+ 24 nil (nil . 25) (25 . [26 27]) ([26 27] . [28 29]) ([28 29] . 30)
+ (30 . 31) ([31 32] . 32) 33 34 35 36 37 38 39 40 [41 42] 43 44 45 46 47 48
+ 49 50]
+ "The structure of the parashiot.
+Hebrew year that starts on Thursday, is `regular' (Heshvan has 29 days and
+Kislev has 30 days), and has Passover start on Saturday.")
+
+(defconst hebrew-calendar-year-Thursday-complete-Sunday
+ [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 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
+ 43 44 45 46 47 48 49 50]
+ "The structure of the parashiot.
+Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev each
+have 30 days), and has Passover start on Sunday.")
+
+;; The seven leap year types (keviot)
+
+(defconst hebrew-calendar-year-Saturday-incomplete-Tuesday
+ [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
+ 23 24 25 26 27 nil 28 29 30 31 32 33 34 35 36 37 38 39 40 [41 42]
+ 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Saturday, is `incomplete' (Heshvan and Kislev each
+have 29 days), and has Passover start on Tuesday.")
+
+(defconst hebrew-calendar-year-Saturday-complete-Thursday
+ [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
+ 23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
+ (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
+have 30 days), and has Passover start on Thursday.")
+
+(defconst hebrew-calendar-year-Monday-incomplete-Thursday
+ [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
+ 23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
+ (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
+have 29 days), and has Passover start on Thursday.")
+
+(defconst hebrew-calendar-year-Monday-complete-Saturday
+ [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
+ 23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
+ (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
+ (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
+ "The structure of the parashiot.
+Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
+30 days), and has Passover start on Saturday.")
+
+(defconst hebrew-calendar-year-Tuesday-regular-Saturday
+ [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
+ 23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
+ (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
+ (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
+ "The structure of the parashiot.
+Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
+Kislev has 30 days), and has Passover start on Saturday.")
+
+(defconst hebrew-calendar-year-Thursday-incomplete-Sunday
+ [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 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
+ 43 44 45 46 47 48 49 50]
+ "The structure of the parashiot.
+Hebrew year that starts on Thursday, is `incomplete' (Heshvan and Kislev both
+have 29 days), and has Passover start on Sunday.")
+
+(defconst hebrew-calendar-year-Thursday-complete-Tuesday
+ [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 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
+ 43 44 45 46 47 48 49 [50 51]]
+ "The structure of the parashiot.
+Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev both
+have 30 days), and has Passover start on Tuesday.")
+
+(defun hebrew-calendar-parasha-name (p)
+ "Name(s) corresponding to parasha P."
+ (if (arrayp p);; combined parasha
+ (format "%s/%s"
+ (aref hebrew-calendar-parashiot-names (aref p 0))
+ (aref hebrew-calendar-parashiot-names (aref p 1)))
+ (aref hebrew-calendar-parashiot-names p)))
+
+(provide 'cal-hebrew)
+
+;;; cal-hebrew.el ends here
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