code.delx.au - gnu-emacs/blob - lisp/calendar/cal-hebrew.el

   1 ;;; cal-hebrew.el --- calendar functions for the Hebrew calendar
   2
   3 ;; Copyright (C) 1995, 1997, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   4 ;;   2008, 2009  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 3 of the License, or
  17 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28
  29 ;; See calendar.el.
  30
  31 ;;; Code:
  32
  33 (require 'calendar)
  34
  35 (define-obsolete-variable-alias 'diary-sabbath-candles-minutes
  36   'diary-hebrew-sabbath-candles-minutes "23.1")
  37
  38 (defcustom diary-hebrew-sabbath-candles-minutes 18
  39   "Number of minutes before sunset for sabbath candle lighting.
  40 Used by `diary-hebrew-sabbath-candles'."
  41   :group 'diary
  42   :type 'integer
  43   :version "21.1")
  44
  45 ;; End of user options.
  46
  47 (defun calendar-hebrew-leap-year-p (year)
  48   "Non-nil if YEAR is a Hebrew calendar leap year."
  49   (< (% (1+ (* 7 year)) 19) 7))
  50
  51 (defun calendar-hebrew-last-month-of-year (year)
  52   "The last month of the Hebrew calendar YEAR."
  53   (if (calendar-hebrew-leap-year-p year)
  54       13
  55     12))
  56
  57 (defun calendar-hebrew-elapsed-days (year)
  58   "Days to mean conjunction of Tishri of Hebrew YEAR.
  59 Measured from Sunday before start of Hebrew calendar."
  60   (let* ((months-elapsed
  61           (+ (* 235 (/ (1- year) 19)) ; months in complete cycles so far
  62              (* 12 (% (1- year) 19))  ; regular months in this cycle
  63              (/ (1+ (* 7 (% (1- year) 19))) 19))) ; leap months this cycle
  64          (parts-elapsed (+ 204 (* 793 (% months-elapsed 1080))))
  65          (hours-elapsed (+ 5
  66                            (* 12 months-elapsed)
  67                            (* 793 (/ months-elapsed 1080))
  68                            (/ parts-elapsed 1080)))
  69          (parts                         ; conjunction parts
  70           (+ (* 1080 (% hours-elapsed 24)) (% parts-elapsed 1080)))
  71          (day                           ; conjunction day
  72           (+ 1 (* 29 months-elapsed) (/ hours-elapsed 24)))
  73          (alternative-day
  74           (if (or (>= parts 19440) ; if the new moon is at or after midday
  75                   (and (= (% day 7) 2)  ; ...or is on a Tuesday...
  76                        (>= parts 9924) ; at 9 hours, 204 parts or later...
  77                        ;; of a common year...
  78                        (not (calendar-hebrew-leap-year-p year)))
  79                   (and (= (% day 7) 1)  ; ...or is on a Monday...
  80                        (>= parts 16789) ; at 15 hours, 589 parts or later...
  81                        ;; at the end of a leap year.
  82                        (calendar-hebrew-leap-year-p (1- year))))
  83               ;; Then postpone Rosh HaShanah one day.
  84               (1+ day)
  85             ;; Else:
  86             day)))
  87     ;; If Rosh HaShanah would occur on Sunday, Wednesday, or Friday
  88     (if (memq (% alternative-day 7) (list 0 3 5))
  89         ;; Then postpone it one (more) day and return.
  90         (1+ alternative-day)
  91       ;; Else return.
  92       alternative-day)))
  93
  94 (defun calendar-hebrew-days-in-year (year)
  95   "Number of days in Hebrew YEAR."
  96   (- (calendar-hebrew-elapsed-days (1+ year))
  97      (calendar-hebrew-elapsed-days year)))
  98
  99 (defun calendar-hebrew-long-heshvan-p (year)
 100   "Non-nil if Heshvan is long in Hebrew YEAR."
 101   (= (% (calendar-hebrew-days-in-year year) 10) 5))
 102
 103 (defun calendar-hebrew-short-kislev-p (year)
 104   "Non-nil if Kislev is short in Hebrew YEAR."
 105   (= (% (calendar-hebrew-days-in-year year) 10) 3))
 106
 107 (defun calendar-hebrew-last-day-of-month (month year)
 108   "The last day of MONTH in YEAR."
 109   (if (or (memq month (list 2 4 6 10 13))
 110           (and (= month 12) (not (calendar-hebrew-leap-year-p year)))
 111           (and (= month 8) (not (calendar-hebrew-long-heshvan-p year)))
 112           (and (= month 9) (calendar-hebrew-short-kislev-p year)))
 113       29
 114     30))
 115
 116 (defun calendar-hebrew-to-absolute (date)
 117   "Absolute date of Hebrew DATE.
 118 The absolute date is the number of days elapsed since the (imaginary)
 119 Gregorian date Sunday, December 31, 1 BC."
 120   (let ((month (calendar-extract-month date))
 121         (day (calendar-extract-day date))
 122         (year (calendar-extract-year date)))
 123     (+ day                              ; days so far this month
 124        (if (< month 7)                  ; before Tishri
 125            ;; Then add days in prior months this year before and after Nisan.
 126            (+ (calendar-sum
 127                m 7 (<= m (calendar-hebrew-last-month-of-year year))
 128                (calendar-hebrew-last-day-of-month m year))
 129               (calendar-sum
 130                m 1 (< m month)
 131                (calendar-hebrew-last-day-of-month m year)))
 132          ;; Else add days in prior months this year.
 133          (calendar-sum
 134           m 7 (< m month)
 135           (calendar-hebrew-last-day-of-month m year)))
 136        (calendar-hebrew-elapsed-days year) ; days in prior years
 137        -1373429)))               ; days elapsed before absolute date 1
 138
 139 (define-obsolete-function-alias 'calendar-absolute-from-hebrew
 140   'calendar-hebrew-to-absolute "23.1")
 141
 142 (defun calendar-hebrew-from-absolute (date)
 143   "Compute the Hebrew date (month day year) corresponding to absolute DATE.
 144 The absolute date is the number of days elapsed since the (imaginary)
 145 Gregorian date Sunday, December 31, 1 BC."
 146   (let* ((greg-date (calendar-gregorian-from-absolute date))
 147          (year (+ 3760 (calendar-extract-year greg-date)))
 148          (month (aref [9 10 11 12 1 2 3 4 7 7 7 8]
 149                       (1- (calendar-extract-month greg-date))))
 150          (length (progn
 151                    (while (>= date (calendar-hebrew-to-absolute
 152                                     (list 7 1 (1+ year))))
 153                      (setq year (1+ year)))
 154                    (calendar-hebrew-last-month-of-year year)))
 155          day)
 156     (while (> date
 157               (calendar-hebrew-to-absolute
 158                (list month
 159                      (calendar-hebrew-last-day-of-month month year)
 160                      year)))
 161       (setq month (1+ (% month length))))
 162     (setq day (1+
 163                (- date (calendar-hebrew-to-absolute (list month 1 year)))))
 164     (list month day year)))
 165
 166 (defconst calendar-hebrew-month-name-array-common-year
 167   ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
 168    "Heshvan" "Kislev" "Teveth" "Shevat" "Adar"]
 169   "Array of strings giving the names of the Hebrew months in a common year.")
 170
 171 (defconst calendar-hebrew-month-name-array-leap-year
 172   ["Nisan" "Iyar" "Sivan" "Tammuz" "Av" "Elul" "Tishri"
 173    "Heshvan" "Kislev" "Teveth" "Shevat" "Adar I" "Adar II"]
 174   "Array of strings giving the names of the Hebrew months in a leap year.")
 175
 176 ;;;###cal-autoload
 177 (defun calendar-hebrew-date-string (&optional date)
 178   "String of Hebrew date before sunset of Gregorian DATE.
 179 Defaults to today's date if DATE is not given.
 180 Driven by the variable `calendar-date-display-form'."
 181   (let* ((hebrew-date (calendar-hebrew-from-absolute
 182                        (calendar-absolute-from-gregorian
 183                         (or date (calendar-current-date)))))
 184          (calendar-month-name-array
 185           (if (calendar-hebrew-leap-year-p (calendar-extract-year hebrew-date))
 186               calendar-hebrew-month-name-array-leap-year
 187             calendar-hebrew-month-name-array-common-year)))
 188     (calendar-date-string hebrew-date nil t)))
 189
 190 ;;;###cal-autoload
 191 (defun calendar-hebrew-print-date ()
 192   "Show the Hebrew calendar equivalent of the date under the cursor."
 193   (interactive)
 194   (message "Hebrew date (until sunset): %s"
 195            (calendar-hebrew-date-string (calendar-cursor-to-date t))))
 196
 197 (define-obsolete-function-alias 'calendar-print-hebrew-date
 198   'calendar-hebrew-print-date "23.1")
 199
 200 (defun calendar-hebrew-yahrzeit (death-date year)
 201   "Absolute date of the anniversary of Hebrew DEATH-DATE in Hebrew YEAR."
 202   (let ((death-day (calendar-extract-day death-date))
 203         (death-month (calendar-extract-month death-date))
 204         (death-year (calendar-extract-year death-date)))
 205     (cond
 206      ;; If it's Heshvan 30 it depends on the first anniversary; if
 207      ;; that was not Heshvan 30, use the day before Kislev 1.
 208      ((and (= death-month 8)
 209            (= death-day 30)
 210            (not (calendar-hebrew-long-heshvan-p (1+ death-year))))
 211       (1- (calendar-hebrew-to-absolute (list 9 1 year))))
 212      ;; If it's Kislev 30 it depends on the first anniversary; if that
 213      ;; was not Kislev 30, use the day before Teveth 1.
 214      ((and (= death-month 9)
 215            (= death-day 30)
 216            (calendar-hebrew-short-kislev-p (1+ death-year)))
 217       (1- (calendar-hebrew-to-absolute (list 10 1 year))))
 218      ;; If it's Adar II, use the same day in last month of year (Adar
 219      ;; or Adar II).
 220      ((= death-month 13)
 221       (calendar-hebrew-to-absolute
 222        (list (calendar-hebrew-last-month-of-year year) death-day year)))
 223      ;; If it's the 30th in Adar I and year is not a leap year (so
 224      ;; Adar has only 29 days), use the last day in Shevat.
 225      ((and (= death-day 30)
 226            (= death-month 12)
 227            (not (calendar-hebrew-leap-year-p year)))
 228       (calendar-hebrew-to-absolute (list 11 30 year)))
 229      ;; In all other cases, use the normal anniversary of the date of death.
 230      (t (calendar-hebrew-to-absolute
 231          (list death-month death-day year))))))
 232
 233 (define-obsolete-function-alias 'hebrew-calendar-yahrzeit
 234   'calendar-hebrew-yahrzeit "23.1")
 235
 236 (defun calendar-hebrew-read-date ()
 237   "Interactively read the arguments for a Hebrew date command.
 238 Reads a year, month, and day."
 239   (let* ((today (calendar-current-date))
 240          (year (calendar-read
 241                 "Hebrew calendar year (>3760): "
 242                 (lambda (x) (> x 3760))
 243                 (number-to-string
 244                  (calendar-extract-year
 245                   (calendar-hebrew-from-absolute
 246                    (calendar-absolute-from-gregorian today))))))
 247          (month-array (if (calendar-hebrew-leap-year-p year)
 248                           calendar-hebrew-month-name-array-leap-year
 249                         calendar-hebrew-month-name-array-common-year))
 250          (completion-ignore-case t)
 251          (month (cdr (assoc-string
 252                       (completing-read
 253                        "Hebrew calendar month name: "
 254                        (mapcar 'list (append month-array nil))
 255                        (if (= year 3761)
 256                            (lambda (x)
 257                              (let ((m (cdr
 258                                        (assoc-string
 259                                         (car x)
 260                                         (calendar-make-alist month-array)
 261                                         t))))
 262                                (< 0
 263                                   (calendar-hebrew-to-absolute
 264                                    (list m
 265                                          (calendar-hebrew-last-day-of-month
 266                                           m year)
 267                                          year))))))
 268                        t)
 269                       (calendar-make-alist month-array 1) t)))
 270          (last (calendar-hebrew-last-day-of-month month year))
 271          (first (if (and (= year 3761) (= month 10))
 272                     18 1))
 273          (day (calendar-read
 274                (format "Hebrew calendar day (%d-%d): "
 275                        first last)
 276                (lambda (x) (and (<= first x) (<= x last))))))
 277     (list (list month day year))))
 278
 279 ;;;###cal-autoload
 280 (defun calendar-hebrew-goto-date (date &optional noecho)
 281   "Move cursor to Hebrew DATE; echo Hebrew date unless NOECHO is non-nil."
 282   (interactive (calendar-hebrew-read-date))
 283   (calendar-goto-date (calendar-gregorian-from-absolute
 284                        (calendar-hebrew-to-absolute date)))
 285   (or noecho (calendar-hebrew-print-date)))
 286
 287 (define-obsolete-function-alias 'calendar-goto-hebrew-date
 288   'calendar-hebrew-goto-date "23.1")
 289
 290 (defvar displayed-month)                ; from calendar-generate
 291
 292 (defun calendar-hebrew-date-is-visible-p (month day)
 293   "Return non-nil if Hebrew MONTH DAY is visible in the calendar window.
 294 Returns the corresponding Gregorian date."
 295   ;; This test is only to speed things up a bit; it works fine without it.
 296   (if (memq displayed-month
 297             ;; What this is doing is equivalent to +1,2,3,4,5 modulo 12, ie:
 298             ;;  (mapcar (lambda (n) (let ((x (mod n 12)))
 299             ;;                        (if (zerop x) 12
 300             ;;                          x)))
 301             ;;          (number-sequence (1+ month) (+ 5 month)))
 302             ;; Ie it makes a list:
 303             ;;  2  3  4  5  6 when month = 1
 304             ;;  3  4  5  6  7 when month = 2
 305             ;; ...
 306             ;;  8  9 10 11 12 when month = 7
 307             ;;  9 10 11 12  1 when month = 8
 308             ;; ...
 309             ;; 12  1  2  3  4 when month = 11
 310             ;;  1  2  3  4  5 when month = 12
 311             ;; This implies that hebrew month N cannot occur outside
 312             ;; Gregorian months N:N+6 (the calendar shows
 313             ;; displayed-month +/- 1 at any time).
 314             ;; So to put it another way:
 315             ;;  (calendar-interval month 1 displayed-month
 316             ;;                    (if (> month displayed-month) 2 1))
 317             ;; must be >= 1 and <= 5.  This could be expanded to:
 318             ;;  (if (> month displayed-month) (+ 12 (- displayed-month month))
 319             ;;    (- displayed-month month)
 320             (list
 321              (if (< 11 month) (- month 11) (+ month 1))
 322              (if (< 10 month) (- month 10) (+ month 2))
 323              (if (<  9 month) (- month  9) (+ month 3))
 324              (if (<  8 month) (- month  8) (+ month 4))
 325              (if (<  7 month) (- month  7) (+ month 5))))
 326       (calendar-nongregorian-visible-p
 327        month day 'calendar-hebrew-to-absolute
 328        'calendar-hebrew-from-absolute
 329        ;; Hebrew new year is start of month 7.
 330        ;; If hmonth >= 7, choose the higher year.
 331        (lambda (m) (> m 6)))))
 332
 333 ;;;###holiday-autoload
 334 (defun holiday-hebrew (month day string)
 335   "Holiday on MONTH, DAY (Hebrew) called STRING.
 336 If MONTH, DAY (Hebrew) is visible, the value returned is corresponding
 337 Gregorian date in the form of the list (((month day year) STRING)).  Returns
 338 nil if it is not visible in the current calendar window."
 339   (let ((gdate (calendar-hebrew-date-is-visible-p month day)))
 340     (if gdate (list (list gdate string)))))
 341
 342 ;; h-r-h-e should be called from holidays code.
 343 (declare-function holiday-filter-visible-calendar "holidays" (l))
 344
 345 (defvar displayed-year)
 346
 347 ;;;###holiday-autoload
 348 (defun holiday-hebrew-rosh-hashanah (&optional all)
 349   "List of dates related to Rosh Hashanah, as visible in calendar window.
 350 Shows only the major holidays, unless `calendar-hebrew-all-holidays-flag'
 351 or ALL is non-nil."
 352   (when (memq displayed-month '(8 9 10 11))
 353     (let ((abs-r-h (calendar-hebrew-to-absolute
 354                     (list 7 1 (+ displayed-year 3761)))))
 355       (holiday-filter-visible-calendar
 356        (append
 357         (list
 358          (list (calendar-gregorian-from-absolute abs-r-h)
 359                (format "Rosh HaShanah %d" (+ 3761 displayed-year)))
 360          (list (calendar-gregorian-from-absolute (+ abs-r-h 9))
 361                "Yom Kippur")
 362          (list (calendar-gregorian-from-absolute (+ abs-r-h 14))
 363                "Sukkot")
 364          (list (calendar-gregorian-from-absolute (+ abs-r-h 21))
 365                "Shemini Atzeret")
 366          (list (calendar-gregorian-from-absolute (+ abs-r-h 22))
 367                "Simchat Torah"))
 368         (when (or all calendar-hebrew-all-holidays-flag)
 369           (list
 370            (list (calendar-gregorian-from-absolute
 371                   (calendar-dayname-on-or-before 6 (- abs-r-h 4)))
 372                  "Selichot (night)")
 373            (list (calendar-gregorian-from-absolute (1- abs-r-h))
 374                  "Erev Rosh HaShanah")
 375            (list (calendar-gregorian-from-absolute (1+ abs-r-h))
 376                  "Rosh HaShanah (second day)")
 377            (list (calendar-gregorian-from-absolute
 378                   (if (= (% abs-r-h 7) 4) (+ abs-r-h 3) (+ abs-r-h 2)))
 379                  "Tzom Gedaliah")
 380            (list (calendar-gregorian-from-absolute
 381                   (calendar-dayname-on-or-before 6 (+ 7 abs-r-h)))
 382                  "Shabbat Shuvah")
 383            (list (calendar-gregorian-from-absolute (+ abs-r-h 8))
 384                  "Erev Yom Kippur")
 385            (list (calendar-gregorian-from-absolute (+ abs-r-h 13))
 386                  "Erev Sukkot")
 387            (list (calendar-gregorian-from-absolute (+ abs-r-h 15))
 388                  "Sukkot (second day)")
 389            (list (calendar-gregorian-from-absolute (+ abs-r-h 16))
 390                  "Hol Hamoed Sukkot (first day)")
 391            (list (calendar-gregorian-from-absolute (+ abs-r-h 17))
 392                  "Hol Hamoed Sukkot (second day)")
 393            (list (calendar-gregorian-from-absolute (+ abs-r-h 18))
 394                  "Hol Hamoed Sukkot (third day)")
 395            (list (calendar-gregorian-from-absolute (+ abs-r-h 19))
 396                  "Hol Hamoed Sukkot (fourth day)")
 397            (list (calendar-gregorian-from-absolute (+ abs-r-h 20))
 398                    "Hoshanah Rabbah"))))))))
 399
 400 ;;;###holiday-autoload
 401 (define-obsolete-function-alias 'holiday-rosh-hashanah-etc
 402   'holiday-hebrew-rosh-hashanah "23.1")
 403
 404 ;;;###holiday-autoload
 405 (defun holiday-hebrew-hanukkah (&optional all)
 406   "List of dates related to Hanukkah, as visible in calendar window.
 407 Shows only Hanukkah, unless `calendar-hebrew-all-holidays-flag' or ALL
 408 is non-nil."
 409   ;; This test is only to speed things up a bit, it works fine without it.
 410   (when (memq displayed-month '(10 11 12 1 2))
 411     (let* ((m displayed-month)
 412            (y displayed-year)
 413            (h-y (progn
 414                   (calendar-increment-month m y 1)
 415                   (calendar-extract-year
 416                    (calendar-hebrew-from-absolute
 417                     (calendar-absolute-from-gregorian
 418                      (list m (calendar-last-day-of-month m y) y))))))
 419            (abs-h (calendar-hebrew-to-absolute (list 9 25 h-y)))
 420            (ord ["first" "second" "third" "fourth" "fifth" "sixth"
 421                  "seventh" "eighth"])
 422            han)
 423       (holiday-filter-visible-calendar
 424        (if (or all calendar-hebrew-all-holidays-flag)
 425            (append
 426             (list
 427              (list (calendar-gregorian-from-absolute (1- abs-h))
 428                    "Erev Hanukkah"))
 429             (dotimes (i 8 (nreverse han))
 430               (push (list
 431                      (calendar-gregorian-from-absolute (+ abs-h i))
 432                      (format "Hanukkah (%s day)" (aref ord i)))
 433                     han)))
 434          (list (list (calendar-gregorian-from-absolute abs-h) "Hanukkah")))))))
 435
 436 ;;;###holiday-autoload
 437 (define-obsolete-function-alias 'holiday-hanukkah
 438   'holiday-hebrew-hanukkah "23.1")
 439
 440 ;;;###holiday-autoload
 441 (defun holiday-hebrew-passover (&optional all)
 442   "List of dates related to Passover, as visible in calendar window.
 443 Shows only the major holidays, unless `calendar-hebrew-all-holidays-flag'
 444 or ALL is non-nil."
 445   (when (< displayed-month 8)
 446     (let ((abs-p (calendar-hebrew-to-absolute
 447                   (list 1 15 (+ displayed-year 3760)))))
 448       (holiday-filter-visible-calendar
 449        ;; The first two are out of order when the others are added.
 450        (append
 451         (list
 452          (list (calendar-gregorian-from-absolute abs-p) "Passover")
 453          (list (calendar-gregorian-from-absolute (+ abs-p 50))
 454                     "Shavuot"))
 455         (when (or all calendar-hebrew-all-holidays-flag)
 456           (list
 457            (list (calendar-gregorian-from-absolute
 458                   (calendar-dayname-on-or-before 6 (- abs-p 43)))
 459                  "Shabbat Shekalim")
 460            (list (calendar-gregorian-from-absolute
 461                   (calendar-dayname-on-or-before 6 (- abs-p 30)))
 462                  "Shabbat Zachor")
 463            (list (calendar-gregorian-from-absolute
 464                   (if (= (% abs-p 7) 2) (- abs-p 33) (- abs-p 31)))
 465                  "Fast of Esther")
 466            (list (calendar-gregorian-from-absolute (- abs-p 31))
 467                  "Erev Purim")
 468            (list (calendar-gregorian-from-absolute (- abs-p 30))
 469                  "Purim")
 470            (list (calendar-gregorian-from-absolute
 471                   (if (zerop (% abs-p 7)) (- abs-p 28) (- abs-p 29)))
 472                  "Shushan Purim")
 473            (list (calendar-gregorian-from-absolute
 474                   (- (calendar-dayname-on-or-before 6 (- abs-p 14)) 7))
 475                  "Shabbat Parah")
 476            (list (calendar-gregorian-from-absolute
 477                   (calendar-dayname-on-or-before 6 (- abs-p 14)))
 478                  "Shabbat HaHodesh")
 479            (list (calendar-gregorian-from-absolute
 480                   (calendar-dayname-on-or-before 6 (1- abs-p)))
 481                  "Shabbat HaGadol")
 482            (list (calendar-gregorian-from-absolute (1- abs-p))
 483                  "Erev Passover")
 484            (list (calendar-gregorian-from-absolute (1+ abs-p))
 485                  "Passover (second day)")
 486            (list (calendar-gregorian-from-absolute (+ abs-p 2))
 487                  "Hol Hamoed Passover (first day)")
 488            (list (calendar-gregorian-from-absolute (+ abs-p 3))
 489                  "Hol Hamoed Passover (second day)")
 490            (list (calendar-gregorian-from-absolute (+ abs-p 4))
 491                  "Hol Hamoed Passover (third day)")
 492            (list (calendar-gregorian-from-absolute (+ abs-p 5))
 493                  "Hol Hamoed Passover (fourth day)")
 494            (list (calendar-gregorian-from-absolute (+ abs-p 6))
 495                  "Passover (seventh day)")
 496            (list (calendar-gregorian-from-absolute (+ abs-p 7))
 497                  "Passover (eighth day)")
 498            (list (calendar-gregorian-from-absolute
 499                   (if (zerop (% (+ abs-p 12) 7))
 500                       (+ abs-p 13)
 501                     (+ abs-p 12)))
 502                  "Yom HaShoah")
 503            (list (calendar-gregorian-from-absolute
 504                   (if (zerop (% abs-p 7))
 505                       (+ abs-p 18)
 506                     (if (= (% abs-p 7) 6)
 507                         (+ abs-p 19)
 508                       (+ abs-p 20))))
 509                  "Yom HaAtzma'ut")
 510            (list (calendar-gregorian-from-absolute (+ abs-p 33))
 511                  "Lag BaOmer")
 512            (list (calendar-gregorian-from-absolute (+ abs-p 43))
 513                  "Yom Yerushalaim")
 514            (list (calendar-gregorian-from-absolute (+ abs-p 49))
 515                  "Erev Shavuot")
 516            (list (calendar-gregorian-from-absolute (+ abs-p 51))
 517                  "Shavuot (second day)"))))))))
 518
 519 ;;;###holiday-autoload
 520 (define-obsolete-function-alias 'holiday-passover-etc
 521   'holiday-hebrew-passover "23.1")
 522
 523 ;;;###holiday-autoload
 524 (defun holiday-hebrew-tisha-b-av ()
 525   "List of dates around Tisha B'Av, as visible in calendar window."
 526   (when (memq displayed-month '(5 6 7 8 9))
 527     (let ((abs-t-a (calendar-hebrew-to-absolute
 528                     (list 5 9 (+ displayed-year 3760)))))
 529       (holiday-filter-visible-calendar
 530        (list
 531         (list (calendar-gregorian-from-absolute
 532                (if (= (% abs-t-a 7) 6) (- abs-t-a 20) (- abs-t-a 21)))
 533               "Tzom Tammuz")
 534         (list (calendar-gregorian-from-absolute
 535                (calendar-dayname-on-or-before 6 abs-t-a))
 536               "Shabbat Hazon")
 537         (list (calendar-gregorian-from-absolute
 538                (if (= (% abs-t-a 7) 6) (1+ abs-t-a) abs-t-a))
 539               "Tisha B'Av")
 540         (list (calendar-gregorian-from-absolute
 541                (calendar-dayname-on-or-before 6 (+ abs-t-a 7)))
 542               "Shabbat Nahamu"))))))
 543
 544 ;;;###holiday-autoload
 545 (define-obsolete-function-alias 'holiday-tisha-b-av-etc
 546   'holiday-hebrew-tisha-b-av "23.1")
 547
 548 (autoload 'holiday-julian "cal-julian")
 549
 550 ;;;###holiday-autoload
 551 (defun holiday-hebrew-misc ()
 552   "Miscellaneous Hebrew holidays, if visible in calendar window.
 553 Includes: Tal Umatar, Tzom Teveth, Tu B'Shevat, Shabbat Shirah, and
 554 Kiddush HaHamah."
 555   (let ((m displayed-month)
 556         (y displayed-year)
 557         year h-year s-s)
 558     (append
 559      (holiday-julian
 560       11
 561       (progn
 562         (calendar-increment-month m y -1)
 563         (setq year (calendar-extract-year
 564                     (calendar-julian-from-absolute
 565                      (calendar-absolute-from-gregorian (list m 1 y)))))
 566         (if (zerop (% (1+ year) 4))
 567             22
 568           21)) "\"Tal Umatar\" (evening)")
 569      (holiday-hebrew
 570       10
 571       (progn
 572         (setq h-year (calendar-extract-year
 573                       (calendar-hebrew-from-absolute
 574                        (calendar-absolute-from-gregorian
 575                         (list displayed-month 28 displayed-year)))))
 576         (if (= 6 (% (calendar-hebrew-to-absolute (list 10 10 h-year))
 577                     7))
 578             11 10))
 579       "Tzom Teveth")
 580      (holiday-hebrew 11 15 "Tu B'Shevat")
 581      (holiday-hebrew
 582       11
 583       (progn
 584         (setq m displayed-month
 585               y displayed-year
 586               h-year (progn
 587                        (calendar-increment-month m y 1)
 588                        (calendar-extract-year
 589                         (calendar-hebrew-from-absolute
 590                          (calendar-absolute-from-gregorian
 591                           (list m (calendar-last-day-of-month m y) y)))))
 592               s-s
 593               (calendar-hebrew-from-absolute
 594                (if (= 6
 595                       (% (calendar-hebrew-to-absolute
 596                           (list 7 1 h-year))
 597                          7))
 598                    (calendar-dayname-on-or-before
 599                     6 (calendar-hebrew-to-absolute
 600                        (list 11 17 h-year)))
 601                  (calendar-dayname-on-or-before
 602                   6 (calendar-hebrew-to-absolute
 603                      (list 11 16 h-year))))))
 604         (calendar-extract-day s-s))
 605       "Shabbat Shirah")
 606      (and (progn
 607             (setq m displayed-month
 608                   y displayed-year
 609                   year (progn
 610                          (calendar-increment-month m y -1)
 611                          (calendar-extract-year
 612                           (calendar-julian-from-absolute
 613                            (calendar-absolute-from-gregorian (list m 1 y))))))
 614             (= 21 (% year 28)))
 615           (holiday-julian 3 26 "Kiddush HaHamah")))))
 616
 617
 618 (autoload 'diary-list-entries-1 "diary-lib")
 619
 620 ;;;###diary-autoload
 621 (defun diary-hebrew-list-entries ()
 622   "Add any Hebrew date entries from the diary file to `diary-entries-list'.
 623 Hebrew date diary entries must be prefaced by `diary-hebrew-entry-symbol'
 624 \(normally an `H').  The same diary date forms govern the style
 625 of the Hebrew calendar entries, except that the Hebrew month
 626 names cannot be abbreviated.  The Hebrew months are numbered
 627 from 1 to 13 with Nisan being 1, 12 being Adar I and 13 being
 628 Adar II; you must use `Adar I' if you want Adar of a common
 629 Hebrew year.  If a Hebrew date diary entry begins with
 630 `diary-nonmarking-symbol', the entry will appear in the diary
 631 listing, but will not be marked in the calendar.  This function
 632 is provided for use with `diary-nongregorian-listing-hook'."
 633   (diary-list-entries-1 calendar-hebrew-month-name-array-leap-year
 634                         diary-hebrew-entry-symbol
 635                         'calendar-hebrew-from-absolute))
 636 ;;;###diary-autoload
 637 (define-obsolete-function-alias 'list-hebrew-diary-entries
 638   'diary-hebrew-list-entries "23.1")
 639
 640 (autoload 'calendar-mark-complex "diary-lib")
 641
 642 ;;;###diary-autoload
 643 (defun calendar-hebrew-mark-date-pattern (month day year &optional color)
 644   "Mark dates in calendar window that conform to Hebrew date MONTH/DAY/YEAR.
 645 A value of 0 in any position is a wildcard.  Optional argument COLOR is
 646 passed to `calendar-mark-visible-date' as MARK."
 647   ;; FIXME not the same as the Bahai and Islamic cases, so can't use
 648   ;; calendar-mark-1.
 649   (with-current-buffer calendar-buffer
 650     (if (and (not (zerop month)) (not (zerop day)))
 651         (if (not (zerop year))
 652             ;; Fully specified Hebrew date.
 653             (let ((date (calendar-gregorian-from-absolute
 654                          (calendar-hebrew-to-absolute
 655                           (list month day year)))))
 656               (if (calendar-date-is-visible-p date)
 657                   (calendar-mark-visible-date date color)))
 658           ;; Month and day in any year.
 659           (let ((gdate (calendar-hebrew-date-is-visible-p month day)))
 660             (if gdate (calendar-mark-visible-date gdate color))))
 661       (calendar-mark-complex month day year
 662                              'calendar-hebrew-from-absolute color))))
 663
 664 ;;;###diary-autoload
 665 (define-obsolete-function-alias 'mark-hebrew-calendar-date-pattern
 666   'calendar-hebrew-mark-date-pattern "23.1")
 667
 668 (autoload 'diary-mark-entries-1 "diary-lib")
 669
 670 ;;;###diary-autoload
 671 (defun diary-hebrew-mark-entries ()
 672   "Mark days in the calendar window that have Hebrew date diary entries.
 673 Marks each entry in `diary-file' (or included files) visible in the calendar
 674 window.  See `list-hebrew-diary-entries' for more information."
 675   (diary-mark-entries-1 'calendar-hebrew-mark-date-pattern
 676                         calendar-hebrew-month-name-array-leap-year
 677                         diary-hebrew-entry-symbol
 678                         'calendar-hebrew-from-absolute))
 679
 680 ;;;###diary-autoload
 681 (define-obsolete-function-alias 'mark-hebrew-diary-entries
 682   'diary-hebrew-mark-entries "23.1")
 683
 684 (autoload 'diary-insert-entry-1 "diary-lib")
 685
 686 ;;;###cal-autoload
 687 (defun diary-hebrew-insert-entry (arg)
 688   "Insert a diary entry for the Hebrew date at point.
 689 Prefix argument ARG makes the entry nonmarking."
 690   (interactive "P")
 691   (diary-insert-entry-1 nil arg calendar-hebrew-month-name-array-leap-year
 692                         diary-hebrew-entry-symbol
 693                         'calendar-hebrew-from-absolute))
 694
 695 ;;;###diary-autoload
 696 (define-obsolete-function-alias 'insert-hebrew-diary-entry
 697   'diary-hebrew-insert-entry "23.1")
 698
 699 ;;;###cal-autoload
 700 (defun diary-hebrew-insert-monthly-entry (arg)
 701   "Insert a monthly diary entry.
 702 For the day of the Hebrew month corresponding to the date indicated by point.
 703 Prefix argument ARG makes the entry nonmarking."
 704   (interactive "P")
 705   (diary-insert-entry-1 'monthly arg calendar-hebrew-month-name-array-leap-year
 706                         diary-hebrew-entry-symbol
 707                         'calendar-hebrew-from-absolute))
 708 ;;;###diary-autoload
 709 (define-obsolete-function-alias 'insert-monthly-hebrew-diary-entry
 710   'diary-hebrew-insert-monthly-entry "23.1")
 711
 712 ;;;###cal-autoload
 713 (defun diary-hebrew-insert-yearly-entry (arg)
 714   "Insert an annual diary entry.
 715 For the day of the Hebrew year corresponding to the date indicated by point.
 716 Prefix argument ARG makes the entry nonmarking."
 717   (interactive "P")
 718   (diary-insert-entry-1 'yearly arg calendar-hebrew-month-name-array-leap-year
 719                         diary-hebrew-entry-symbol
 720                         'calendar-hebrew-from-absolute))
 721 ;;;###diary-autoload
 722 (define-obsolete-function-alias 'insert-yearly-hebrew-diary-entry
 723   'diary-hebrew-insert-yearly-entry "23.1")
 724
 725 ;;;###autoload
 726 (defun calendar-hebrew-list-yahrzeits (death-date start-year end-year)
 727   "List Yahrzeit dates for *Gregorian* DEATH-DATE from START-YEAR to END-YEAR.
 728 When called interactively from the calendar window, the date of death is taken
 729 from the cursor position."
 730   (interactive
 731    (let* ((death-date
 732            (if (equal (current-buffer) (get-buffer calendar-buffer))
 733                (calendar-cursor-to-date)
 734              (let* ((today (calendar-current-date))
 735                     (year (calendar-read
 736                            "Year of death (>0): "
 737                            (lambda (x) (> x 0))
 738                            (number-to-string (calendar-extract-year today))))
 739                     (month-array calendar-month-name-array)
 740                     (completion-ignore-case t)
 741                     (month (cdr (assoc-string
 742                                  (completing-read
 743                                   "Month of death (name): "
 744                                   (mapcar 'list (append month-array nil))
 745                                   nil t)
 746                                  (calendar-make-alist month-array 1) t)))
 747                     (last (calendar-last-day-of-month month year))
 748                     (day (calendar-read
 749                           (format "Day of death (1-%d): " last)
 750                           (lambda (x) (and (< 0 x) (<= x last))))))
 751                (list month day year))))
 752           (death-year (calendar-extract-year death-date))
 753           (start-year (calendar-read
 754                        (format "Starting year of Yahrzeit table (>%d): "
 755                                death-year)
 756                        (lambda (x) (> x death-year))
 757                        (number-to-string (1+ death-year))))
 758           (end-year (calendar-read
 759                      (format "Ending year of Yahrzeit table (>=%d): "
 760                              start-year)
 761                      (lambda (x) (>= x start-year)))))
 762      (list death-date start-year end-year)))
 763   (message "Computing Yahrzeits...")
 764   (let* ((h-date (calendar-hebrew-from-absolute
 765                   (calendar-absolute-from-gregorian death-date)))
 766          (h-month (calendar-extract-month h-date))
 767          (h-day (calendar-extract-day h-date))
 768          (h-year (calendar-extract-year h-date))
 769          (i (1- start-year)))
 770     (calendar-in-read-only-buffer calendar-hebrew-yahrzeit-buffer
 771       (calendar-set-mode-line
 772        (format "Yahrzeit dates for %s = %s"
 773                (calendar-date-string death-date)
 774                (let ((calendar-month-name-array
 775                       (if (calendar-hebrew-leap-year-p h-year)
 776                           calendar-hebrew-month-name-array-leap-year
 777                         calendar-hebrew-month-name-array-common-year)))
 778                  (calendar-date-string h-date nil t))))
 779       (while (<= (setq i (1+ i)) end-year)
 780         (insert
 781          (calendar-date-string
 782           (calendar-gregorian-from-absolute
 783            (calendar-hebrew-yahrzeit
 784             h-date
 785             (calendar-extract-year
 786              (calendar-hebrew-from-absolute
 787               (calendar-absolute-from-gregorian (list 1 1 i))))))) "\n"))))
 788   (message "Computing Yahrzeits...done"))
 789
 790 ;;;###autoload
 791 (define-obsolete-function-alias 'list-yahrzeit-dates
 792   'calendar-hebrew-list-yahrzeits "23.1")
 793
 794 (defvar date)
 795
 796 ;; To be called from diary-list-sexp-entries, where DATE is bound.
 797 ;;;###diary-autoload
 798 (defun diary-hebrew-date ()
 799   "Hebrew calendar equivalent of date diary entry."
 800   (format "Hebrew date (until sunset): %s" (calendar-hebrew-date-string date)))
 801
 802 ;;;###diary-autoload
 803 (defun diary-hebrew-omer (&optional mark)
 804   "Omer count diary entry.
 805 Entry applies if date is within 50 days after Passover.
 806
 807 An optional parameter MARK specifies a face or single-character string to
 808 use when highlighting the day in the calendar."
 809   (let* ((passover
 810           (calendar-hebrew-to-absolute
 811            (list 1 15 (+ (calendar-extract-year date) 3760))))
 812          (omer (- (calendar-absolute-from-gregorian date) passover))
 813          (week (/ omer 7))
 814          (day (% omer 7)))
 815     (if (and (> omer 0) (< omer 50))
 816         (cons mark
 817               (format "Day %d%s of the omer (until sunset)"
 818                       omer
 819                       (if (zerop week)
 820                           ""
 821                         (format ", that is, %d week%s%s"
 822                                 week
 823                                 (if (= week 1) "" "s")
 824                                 (if (zerop day)
 825                                     ""
 826                                   (format " and %d day%s"
 827                                           day (if (= day 1) "" "s"))))))))))
 828 ;;;###diary-autoload
 829 (define-obsolete-function-alias 'diary-omer 'diary-hebrew-omer "23.1")
 830
 831 (defvar entry)
 832
 833 (autoload 'diary-make-date "diary-lib")
 834
 835 (declare-function diary-ordinal-suffix "diary-lib" (n))
 836
 837 ;;;###diary-autoload
 838 (defun diary-hebrew-yahrzeit (death-month death-day death-year &optional mark)
 839   "Yahrzeit diary entry--entry applies if date is Yahrzeit or the day before.
 840 Parameters are DEATH-MONTH, DEATH-DAY, DEATH-YEAR; the diary
 841 entry is assumed to be the name of the person.  Although the date
 842 of death is specified by the civil calendar, the proper Hebrew
 843 calendar Yahrzeit is determined.
 844
 845 The order of the input parameters changes according to `calendar-date-style'
 846 \(e.g. to DEATH-DAY, DEATH-MONTH, DEATH-YEAR in the European style).
 847
 848 An optional parameter MARK specifies a face or single-character string to
 849 use when highlighting the day in the calendar."
 850   (let* ((h-date (calendar-hebrew-from-absolute
 851                   (calendar-absolute-from-gregorian
 852                    (diary-make-date death-month death-day death-year))))
 853          (h-month (calendar-extract-month h-date))
 854          (h-day (calendar-extract-day h-date))
 855          (h-year (calendar-extract-year h-date))
 856          (d (calendar-absolute-from-gregorian date))
 857          (yr (calendar-extract-year (calendar-hebrew-from-absolute d)))
 858          (diff (- yr h-year))
 859          (y (calendar-hebrew-yahrzeit h-date yr)))
 860     (if (and (> diff 0) (or (= y d) (= y (1+ d))))
 861         (cons mark
 862               (format "Yahrzeit of %s%s: %d%s anniversary"
 863                       entry
 864                       (if (= y d) "" " (evening)")
 865                       diff
 866                       (diary-ordinal-suffix diff))))))
 867
 868 ;;;###diary-autoload
 869 (define-obsolete-function-alias 'diary-yahrzeit 'diary-hebrew-yahrzeit "23.1")
 870
 871 ;;;###diary-autoload
 872 (defun diary-hebrew-rosh-hodesh (&optional mark)
 873   "Rosh Hodesh diary entry.
 874 Entry applies if date is Rosh Hodesh, the day before, or the Saturday before.
 875
 876 An optional parameter MARK specifies a face or single-character string to
 877 use when highlighting the day in the calendar."
 878   (let* ((d (calendar-absolute-from-gregorian date))
 879          (h-date (calendar-hebrew-from-absolute d))
 880          (h-month (calendar-extract-month h-date))
 881          (h-day (calendar-extract-day h-date))
 882          (h-year (calendar-extract-year h-date))
 883          (leap-year (calendar-hebrew-leap-year-p h-year))
 884          (last-day (calendar-hebrew-last-day-of-month h-month h-year))
 885          (h-month-names
 886           (if leap-year
 887               calendar-hebrew-month-name-array-leap-year
 888             calendar-hebrew-month-name-array-common-year))
 889          (this-month (aref h-month-names (1- h-month)))
 890          (h-yesterday (calendar-extract-day
 891                        (calendar-hebrew-from-absolute (1- d)))))
 892     (if (or (= h-day 30) (and (= h-day 1) (/= h-month 7)))
 893         (cons mark
 894               (format
 895                "Rosh Hodesh %s"
 896                (if (= h-day 30)
 897                    (format
 898                     "%s (first day)"
 899                     ;; Next month must be in the same year since this
 900                     ;; month can't be the last month of the year since
 901                     ;; it has 30 days
 902                     (aref h-month-names h-month))
 903                  (if (= h-yesterday 30)
 904                      (format "%s (second day)" this-month)
 905                    this-month))))
 906       (if (= (% d 7) 6)        ; Saturday--check for Shabbat Mevarchim
 907           (cons mark
 908                 (cond ((and (> h-day 22) (/= h-month 6) (= 29 last-day))
 909                        (format "Mevarchim Rosh Hodesh %s (%s)"
 910                                (aref h-month-names
 911                                      (if (= h-month
 912                                             (calendar-hebrew-last-month-of-year
 913                                              h-year))
 914                                          0 h-month))
 915                                (aref calendar-day-name-array (- 29 h-day))))
 916                       ((and (< h-day 30) (> h-day 22) (= 30 last-day))
 917                        (format "Mevarchim Rosh Hodesh %s (%s-%s)"
 918                                (aref h-month-names h-month)
 919                                (if (= h-day 29)
 920                                    "tomorrow"
 921                                  (aref calendar-day-name-array (- 29 h-day)))
 922                                (aref calendar-day-name-array
 923                                      (% (- 30 h-day) 7))))))
 924         (if (and (= h-day 29) (/= h-month 6))
 925             (cons mark
 926                   (format "Erev Rosh Hodesh %s"
 927                           (aref h-month-names
 928                                 (if (= h-month
 929                                        (calendar-hebrew-last-month-of-year
 930                                         h-year))
 931                                     0 h-month)))))))))
 932 ;;;###diary-autoload
 933 (define-obsolete-function-alias 'diary-rosh-hodesh
 934   'diary-hebrew-rosh-hodesh "23.1")
 935
 936 (defconst calendar-hebrew-parashiot-names
 937   ["Bereshith"   "Noah"      "Lech L'cha" "Vayera"    "Hayei Sarah" "Toledoth"
 938    "Vayetze"     "Vayishlah" "Vayeshev"   "Mikketz"   "Vayiggash"   "Vayhi"
 939    "Shemoth"     "Vaera"     "Bo"         "Beshallah" "Yithro"      "Mishpatim"
 940    "Terumah"     "Tetzavveh" "Ki Tissa"   "Vayakhel"  "Pekudei"     "Vayikra"
 941    "Tzav"        "Shemini"   "Tazria"     "Metzora"   "Aharei Moth" "Kedoshim"
 942    "Emor"        "Behar"     "Behukkotai" "Bemidbar"  "Naso"      "Behaalot'cha"
 943    "Shelah L'cha" "Korah"    "Hukkath"    "Balak"     "Pinhas"      "Mattoth"
 944    "Masei"       "Devarim"   "Vaethanan"  "Ekev"      "Reeh"        "Shofetim"
 945    "Ki Tetze"    "Ki Tavo"   "Nitzavim"   "Vayelech"  "Haazinu"]
 946   "The names of the parashiot in the Torah.")
 947
 948 (defun calendar-hebrew-parasha-name (p)
 949   "Name(s) corresponding to parasha P."
 950   (if (arrayp p)                        ; combined parasha
 951       (format "%s/%s"
 952               (aref calendar-hebrew-parashiot-names (aref p 0))
 953               (aref calendar-hebrew-parashiot-names (aref p 1)))
 954     (aref calendar-hebrew-parashiot-names p)))
 955
 956 ;; Following 14 constants are used in diary-parasha (intern).
 957
 958 ;; The seven ordinary year types (keviot).
 959 (defconst calendar-hebrew-year-Saturday-incomplete-Sunday
 960   [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]
 961        23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
 962        43 44 45 46 47 48 49 50]
 963   "The structure of the parashiot.
 964 Hebrew year starts on Saturday, is `incomplete' (Heshvan and Kislev each have
 965 29 days), and has Passover start on Sunday.")
 966
 967 (defconst calendar-hebrew-year-Saturday-complete-Tuesday
 968   [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]
 969        23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
 970        43 44 45 46 47 48 49 [50 51]]
 971   "The structure of the parashiot.
 972 Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
 973 have 30 days), and has Passover start on Tuesday.")
 974
 975 (defconst calendar-hebrew-year-Monday-incomplete-Tuesday
 976   [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]
 977       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
 978       43 44 45 46 47 48 49 [50 51]]
 979   "The structure of the parashiot.
 980 Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
 981 have 29 days), and has Passover start on Tuesday.")
 982
 983 (defconst calendar-hebrew-year-Monday-complete-Thursday
 984   [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]
 985       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
 986       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
 987   "The structure of the parashiot.
 988 Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
 989 30 days), and has Passover start on Thursday.")
 990
 991 (defconst calendar-hebrew-year-Tuesday-regular-Thursday
 992   [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]
 993       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 (nil . 34) (34 . 35) (35 . 36)
 994       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
 995   "The structure of the parashiot.
 996 Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
 997 Kislev has 30 days), and has Passover start on Thursday.")
 998
 999 (defconst calendar-hebrew-year-Thursday-regular-Saturday
1000   [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
1001       24 nil (nil . 25) (25 . [26 27]) ([26 27] . [28 29]) ([28 29] . 30)
1002       (30 . 31) ([31 32] . 32) 33 34 35 36 37 38 39 40 [41 42] 43 44 45 46 47 48
1003       49 50]
1004   "The structure of the parashiot.
1005 Hebrew year that starts on Thursday, is `regular' (Heshvan has 29 days and
1006 Kislev has 30 days), and has Passover start on Saturday.")
1007
1008 (defconst calendar-hebrew-year-Thursday-complete-Sunday
1009   [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
1010       23 24 nil 25 [26 27] [28 29] 30 [31 32] 33 34 35 36 37 38 39 40 [41 42]
1011       43 44 45 46 47 48 49 50]
1012   "The structure of the parashiot.
1013 Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev each
1014 have 30 days), and has Passover start on Sunday.")
1015
1016 ;; The seven leap year types (keviot).
1017 (defconst calendar-hebrew-year-Saturday-incomplete-Tuesday
1018   [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
1019        23 24 25 26 27 nil 28 29 30 31 32 33 34 35 36 37 38 39 40 [41 42]
1020        43 44 45 46 47 48 49 [50 51]]
1021   "The structure of the parashiot.
1022 Hebrew year that starts on Saturday, is `incomplete' (Heshvan and Kislev each
1023 have 29 days), and has Passover start on Tuesday.")
1024
1025 (defconst calendar-hebrew-year-Saturday-complete-Thursday
1026   [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
1027        23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1028        (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1029   "The structure of the parashiot.
1030 Hebrew year that starts on Saturday, is `complete' (Heshvan and Kislev each
1031 have 30 days), and has Passover start on Thursday.")
1032
1033 (defconst calendar-hebrew-year-Monday-incomplete-Thursday
1034   [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
1035       23 24 25 26 27 nil 28 29 30 31 32 33 (nil . 34) (34 . 35) (35 . 36)
1036       (36 . 37) (37 . 38) ([38 39] . 39) 40 [41 42] 43 44 45 46 47 48 49 [50 51]]
1037   "The structure of the parashiot.
1038 Hebrew year that starts on Monday, is `incomplete' (Heshvan and Kislev each
1039 have 29 days), and has Passover start on Thursday.")
1040
1041 (defconst calendar-hebrew-year-Monday-complete-Saturday
1042   [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
1043       23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1044       (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1045       (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1046   "The structure of the parashiot.
1047 Hebrew year that starts on Monday, is `complete' (Heshvan and Kislev each have
1048 30 days), and has Passover start on Saturday.")
1049
1050 (defconst calendar-hebrew-year-Tuesday-regular-Saturday
1051   [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
1052       23 24 25 26 27 nil (nil . 28) (28 . 29) (29 . 30) (30 . 31) (31 . 32)
1053       (32 . 33) (33 . 34) (34 . 35) (35 . 36) (36 . 37) (37 . 38) (38 . 39)
1054       (39 . 40) (40 . 41) ([41 42] . 42) 43 44 45 46 47 48 49 50]
1055   "The structure of the parashiot.
1056 Hebrew year that starts on Tuesday, is `regular' (Heshvan has 29 days and
1057 Kislev has 30 days), and has Passover start on Saturday.")
1058
1059 (defconst calendar-hebrew-year-Thursday-incomplete-Sunday
1060   [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
1061       23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1062       43 44 45 46 47 48 49 50]
1063   "The structure of the parashiot.
1064 Hebrew year that starts on Thursday, is `incomplete' (Heshvan and Kislev both
1065 have 29 days), and has Passover start on Sunday.")
1066
1067 (defconst calendar-hebrew-year-Thursday-complete-Tuesday
1068   [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
1069       23 24 25 26 27 28 nil 29 30 31 32 33 34 35 36 37 38 39 40 41 42
1070       43 44 45 46 47 48 49 [50 51]]
1071   "The structure of the parashiot.
1072 Hebrew year that starts on Thursday, is `complete' (Heshvan and Kislev both
1073 have 30 days), and has Passover start on Tuesday.")
1074
1075 ;;;###diary-autoload
1076 (defun diary-hebrew-parasha (&optional mark)
1077   "Parasha diary entry--entry applies if date is a Saturday.
1078 An optional parameter MARK specifies a face or single-character string to
1079 use when highlighting the day in the calendar."
1080   (let ((d (calendar-absolute-from-gregorian date)))
1081     (if (= (% d 7) 6)                   ; Saturday
1082         (let* ((h-year (calendar-extract-year
1083                         (calendar-hebrew-from-absolute d)))
1084                (rosh-hashanah
1085                 (calendar-hebrew-to-absolute (list 7 1 h-year)))
1086                (passover
1087                 (calendar-hebrew-to-absolute (list 1 15 h-year)))
1088                (rosh-hashanah-day
1089                 (aref calendar-day-name-array (% rosh-hashanah 7)))
1090                (passover-day
1091                 (aref calendar-day-name-array (% passover 7)))
1092                (long-h (calendar-hebrew-long-heshvan-p h-year))
1093                (short-k (calendar-hebrew-short-kislev-p h-year))
1094                (type (cond ((and long-h (not short-k)) "complete")
1095                            ((and (not long-h) short-k) "incomplete")
1096                            (t "regular")))
1097                (year-format
1098                 (symbol-value
1099                  (intern (format "calendar-hebrew-year-%s-%s-%s" ; keviah
1100                                  rosh-hashanah-day type passover-day))))
1101                (first-saturday            ; of Hebrew year
1102                 (calendar-dayname-on-or-before 6 (+ 6 rosh-hashanah)))
1103                (saturday             ; which Saturday of the Hebrew year
1104                 (/ (- d first-saturday) 7))
1105                (parasha (aref year-format saturday)))
1106           (if parasha
1107               (cons mark
1108                     (format
1109                      "Parashat %s"
1110                      (if (listp parasha) ; Israel differs from diaspora
1111                          (if (car parasha)
1112                              (format "%s (diaspora), %s (Israel)"
1113                                      (calendar-hebrew-parasha-name
1114                                       (car parasha))
1115                                      (calendar-hebrew-parasha-name
1116                                       (cdr parasha)))
1117                            (format "%s (Israel)"
1118                                    (calendar-hebrew-parasha-name
1119                                     (cdr parasha))))
1120                        (calendar-hebrew-parasha-name parasha)))))))))
1121
1122 (define-obsolete-function-alias 'diary-parasha 'diary-hebrew-parasha "23.1")
1123
1124
1125 (declare-function solar-setup "solar" ())
1126 (declare-function solar-sunrise-sunset "solar" (date))
1127 (defvar calendar-latitude)
1128 (defvar calendar-longitude)
1129 (defvar calendar-time-zone)
1130
1131
1132 ;; To be called from diary-list-sexp-entries, where DATE is bound.
1133 ;;;###diary-autoload
1134 (defun diary-hebrew-sabbath-candles (&optional mark)
1135   "Local time of candle lighting diary entry--applies if date is a Friday.
1136 No diary entry if there is no sunset on that date.  Uses
1137 `diary-hebrew-sabbath-candles-minutes'.
1138
1139 An optional parameter MARK specifies a face or single-character string to
1140 use when highlighting the day in the calendar."
1141   (require 'solar)
1142   (or (and calendar-latitude calendar-longitude calendar-time-zone)
1143       (solar-setup))
1144   (if (= (% (calendar-absolute-from-gregorian date) 7) 5) ; Friday
1145       (let ((sunset (cadr (solar-sunrise-sunset date))))
1146         (if sunset
1147             (cons mark (format
1148                         "%s Sabbath candle lighting"
1149                         (apply 'solar-time-string
1150                                (cons (- (car sunset)
1151                                         (/ diary-hebrew-sabbath-candles-minutes
1152                                            60.0))
1153                                      (cdr sunset)))))))))
1154
1155 ;;;###diary-autoload
1156 (define-obsolete-function-alias 'diary-sabbath-candles
1157   'diary-hebrew-sabbath-candles "23.1")
1158
1159
1160 (provide 'cal-hebrew)
1161
1162 ;; arch-tag: aaab6718-7712-42ac-a32d-28fe1f944f3c
1163 ;;; cal-hebrew.el ends here