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3afbc435 | 1 | ;;; cal-islam.el --- calendar functions for the Islamic calendar |
0808d911 | 2 | |
48ad4975 | 3 | ;; Copyright (C) 1995, 1997, 2001, 2003 Free Software Foundation, Inc. |
0808d911 ER |
4 | |
5 | ;; Author: Edward M. Reingold <reingold@cs.uiuc.edu> | |
6 | ;; Keywords: calendar | |
7 | ;; Human-Keywords: Islamic calendar, calendar, diary | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
0808d911 ER |
25 | |
26 | ;;; Commentary: | |
27 | ||
28 | ;; This collection of functions implements the features of calendar.el and | |
29 | ;; diary.el that deal with the Islamic calendar. | |
30 | ||
a96a5fca PE |
31 | ;; Technical details of all the calendrical calculations can be found in |
32 | ;; ``Calendrical Calculations'' by Nachum Dershowitz and Edward M. Reingold, | |
33 | ;; Cambridge University Press (1997). | |
34 | ||
0808d911 ER |
35 | ;; Comments, corrections, and improvements should be sent to |
36 | ;; Edward M. Reingold Department of Computer Science | |
37 | ;; (217) 333-6733 University of Illinois at Urbana-Champaign | |
38 | ;; reingold@cs.uiuc.edu 1304 West Springfield Avenue | |
39 | ;; Urbana, Illinois 61801 | |
40 | ||
41 | ;;; Code: | |
42 | ||
48ad4975 GM |
43 | (defvar displayed-month) |
44 | (defvar displayed-year) | |
45 | ||
0808d911 ER |
46 | (require 'cal-julian) |
47 | ||
48 | (defvar calendar-islamic-month-name-array | |
49 | ["Muharram" "Safar" "Rabi I" "Rabi II" "Jumada I" "Jumada II" | |
48ad4975 GM |
50 | "Rajab" "Sha'ban" "Ramadan" "Shawwal" "Dhu al-Qada" "Dhu al-Hijjah"] |
51 | "Array of strings giving the names of the Islamic months.") | |
0808d911 ER |
52 | |
53 | (defvar calendar-islamic-epoch (calendar-absolute-from-julian '(7 16 622)) | |
54 | "Absolute date of start of Islamic calendar = August 29, 284 A.D. (Julian).") | |
55 | ||
56 | (defun islamic-calendar-leap-year-p (year) | |
57 | "Returns t if YEAR is a leap year on the Islamic calendar." | |
58 | (memq (% year 30) | |
59 | (list 2 5 7 10 13 16 18 21 24 26 29))) | |
60 | ||
61 | (defun islamic-calendar-last-day-of-month (month year) | |
62 | "The last day in MONTH during YEAR on the Islamic calendar." | |
63 | (cond | |
64 | ((memq month (list 1 3 5 7 9 11)) 30) | |
65 | ((memq month (list 2 4 6 8 10)) 29) | |
66 | (t (if (islamic-calendar-leap-year-p year) 30 29)))) | |
67 | ||
68 | (defun islamic-calendar-day-number (date) | |
69 | "Return the day number within the year of the Islamic date DATE." | |
70 | (let* ((month (extract-calendar-month date)) | |
71 | (day (extract-calendar-day date))) | |
72 | (+ (* 30 (/ month 2)) | |
73 | (* 29 (/ (1- month) 2)) | |
74 | day))) | |
75 | ||
76 | (defun calendar-absolute-from-islamic (date) | |
77 | "Absolute date of Islamic DATE. | |
78 | The absolute date is the number of days elapsed since the (imaginary) | |
79 | Gregorian date Sunday, December 31, 1 BC." | |
80 | (let* ((month (extract-calendar-month date)) | |
81 | (day (extract-calendar-day date)) | |
82 | (year (extract-calendar-year date)) | |
83 | (y (% year 30)) | |
84 | (leap-years-in-cycle | |
85 | (cond | |
86 | ((< y 3) 0) ((< y 6) 1) ((< y 8) 2) ((< y 11) 3) ((< y 14) 4) | |
87 | ((< y 17) 5) ((< y 19) 6) ((< y 22) 7) ((< y 25) 8) ((< y 27) 9) | |
88 | (t 10)))) | |
89 | (+ (islamic-calendar-day-number date);; days so far this year | |
90 | (* (1- year) 354) ;; days in all non-leap years | |
91 | (* 11 (/ year 30)) ;; leap days in complete cycles | |
92 | leap-years-in-cycle ;; leap days this cycle | |
93 | (1- calendar-islamic-epoch)))) ;; days before start of calendar | |
94 | ||
95 | (defun calendar-islamic-from-absolute (date) | |
96 | "Compute the Islamic date (month day year) corresponding to absolute DATE. | |
97 | The absolute date is the number of days elapsed since the (imaginary) | |
98 | Gregorian date Sunday, December 31, 1 BC." | |
99 | (if (< date calendar-islamic-epoch) | |
100 | (list 0 0 0);; pre-Islamic date | |
101 | (let* ((approx (/ (- date calendar-islamic-epoch) | |
102 | 355));; Approximation from below. | |
103 | (year ;; Search forward from the approximation. | |
104 | (+ approx | |
105 | (calendar-sum y approx | |
106 | (>= date (calendar-absolute-from-islamic | |
107 | (list 1 1 (1+ y)))) | |
108 | 1))) | |
109 | (month ;; Search forward from Muharram. | |
110 | (1+ (calendar-sum m 1 | |
111 | (> date | |
112 | (calendar-absolute-from-islamic | |
113 | (list m | |
114 | (islamic-calendar-last-day-of-month | |
115 | m year) | |
116 | year))) | |
117 | 1))) | |
118 | (day ;; Calculate the day by subtraction. | |
119 | (- date | |
120 | (1- (calendar-absolute-from-islamic (list month 1 year)))))) | |
121 | (list month day year)))) | |
122 | ||
123 | (defun calendar-islamic-date-string (&optional date) | |
124 | "String of Islamic date before sunset of Gregorian DATE. | |
125 | Returns the empty string if DATE is pre-Islamic. | |
126 | Defaults to today's date if DATE is not given. | |
127 | Driven by the variable `calendar-date-display-form'." | |
128 | (let ((calendar-month-name-array calendar-islamic-month-name-array) | |
129 | (islamic-date (calendar-islamic-from-absolute | |
130 | (calendar-absolute-from-gregorian | |
131 | (or date (calendar-current-date)))))) | |
132 | (if (< (extract-calendar-year islamic-date) 1) | |
133 | "" | |
134 | (calendar-date-string islamic-date nil t)))) | |
135 | ||
136 | (defun calendar-print-islamic-date () | |
137 | "Show the Islamic calendar equivalent of the date under the cursor." | |
138 | (interactive) | |
139 | (let ((i (calendar-islamic-date-string (calendar-cursor-to-date t)))) | |
140 | (if (string-equal i "") | |
141 | (message "Date is pre-Islamic") | |
142 | (message "Islamic date (until sunset): %s" i)))) | |
143 | ||
144 | (defun calendar-goto-islamic-date (date &optional noecho) | |
145 | "Move cursor to Islamic DATE; echo Islamic date unless NOECHO is t." | |
146 | (interactive | |
147 | (let* ((today (calendar-current-date)) | |
148 | (year (calendar-read | |
149 | "Islamic calendar year (>0): " | |
150 | '(lambda (x) (> x 0)) | |
151 | (int-to-string | |
152 | (extract-calendar-year | |
153 | (calendar-islamic-from-absolute | |
154 | (calendar-absolute-from-gregorian today)))))) | |
155 | (month-array calendar-islamic-month-name-array) | |
156 | (completion-ignore-case t) | |
77cb2f4c | 157 | (month (cdr (assoc-ignore-case |
0808d911 ER |
158 | (completing-read |
159 | "Islamic calendar month name: " | |
160 | (mapcar 'list (append month-array nil)) | |
77cb2f4c RS |
161 | nil t) |
162 | (calendar-make-alist month-array 1)))) | |
0808d911 ER |
163 | (last (islamic-calendar-last-day-of-month month year)) |
164 | (day (calendar-read | |
165 | (format "Islamic calendar day (1-%d): " last) | |
166 | '(lambda (x) (and (< 0 x) (<= x last)))))) | |
167 | (list (list month day year)))) | |
168 | (calendar-goto-date (calendar-gregorian-from-absolute | |
169 | (calendar-absolute-from-islamic date))) | |
170 | (or noecho (calendar-print-islamic-date))) | |
171 | ||
172 | (defun diary-islamic-date () | |
173 | "Islamic calendar equivalent of date diary entry." | |
5cb93910 | 174 | (let ((i (calendar-islamic-date-string date))) |
0808d911 ER |
175 | (if (string-equal i "") |
176 | "Date is pre-Islamic" | |
177 | (format "Islamic date (until sunset): %s" i)))) | |
178 | ||
179 | (defun holiday-islamic (month day string) | |
180 | "Holiday on MONTH, DAY (Islamic) called STRING. | |
181 | If MONTH, DAY (Islamic) is visible, the value returned is corresponding | |
182 | Gregorian date in the form of the list (((month day year) STRING)). Returns | |
183 | nil if it is not visible in the current calendar window." | |
184 | (let* ((islamic-date (calendar-islamic-from-absolute | |
185 | (calendar-absolute-from-gregorian | |
186 | (list displayed-month 15 displayed-year)))) | |
187 | (m (extract-calendar-month islamic-date)) | |
188 | (y (extract-calendar-year islamic-date)) | |
189 | (date)) | |
190 | (if (< m 1) | |
191 | nil;; Islamic calendar doesn't apply. | |
192 | (increment-calendar-month m y (- 10 month)) | |
193 | (if (> m 7);; Islamic date might be visible | |
194 | (let ((date (calendar-gregorian-from-absolute | |
195 | (calendar-absolute-from-islamic (list month day y))))) | |
196 | (if (calendar-date-is-visible-p date) | |
197 | (list (list date string)))))))) | |
198 | ||
199 | (defun list-islamic-diary-entries () | |
200 | "Add any Islamic date entries from the diary file to `diary-entries-list'. | |
201 | Islamic date diary entries must be prefaced by an `islamic-diary-entry-symbol' | |
202 | \(normally an `I'). The same diary date forms govern the style of the Islamic | |
203 | calendar entries, except that the Islamic month names must be spelled in full. | |
204 | The Islamic months are numbered from 1 to 12 with Muharram being 1 and 12 being | |
205 | Dhu al-Hijjah. If an Islamic date diary entry begins with a | |
206 | `diary-nonmarking-symbol', the entry will appear in the diary listing, but will | |
207 | not be marked in the calendar. This function is provided for use with the | |
208 | `nongregorian-diary-listing-hook'." | |
209 | (if (< 0 number) | |
210 | (let ((buffer-read-only nil) | |
211 | (diary-modified (buffer-modified-p)) | |
212 | (gdate original-date) | |
213 | (mark (regexp-quote diary-nonmarking-symbol))) | |
214 | (calendar-for-loop i from 1 to number do | |
215 | (let* ((d diary-date-forms) | |
a1506d29 | 216 | (idate (calendar-islamic-from-absolute |
0808d911 ER |
217 | (calendar-absolute-from-gregorian gdate))) |
218 | (month (extract-calendar-month idate)) | |
219 | (day (extract-calendar-day idate)) | |
220 | (year (extract-calendar-year idate))) | |
221 | (while d | |
222 | (let* | |
223 | ((date-form (if (equal (car (car d)) 'backup) | |
224 | (cdr (car d)) | |
225 | (car d))) | |
226 | (backup (equal (car (car d)) 'backup)) | |
227 | (dayname | |
48ad4975 GM |
228 | (format "%s\\|%s\\.?" |
229 | (calendar-day-name gdate) | |
230 | (calendar-day-name gdate 'abbrev))) | |
0808d911 ER |
231 | (calendar-month-name-array |
232 | calendar-islamic-month-name-array) | |
233 | (monthname | |
234 | (concat | |
235 | "\\*\\|" | |
236 | (calendar-month-name month))) | |
237 | (month (concat "\\*\\|0*" (int-to-string month))) | |
238 | (day (concat "\\*\\|0*" (int-to-string day))) | |
239 | (year | |
240 | (concat | |
241 | "\\*\\|0*" (int-to-string year) | |
242 | (if abbreviated-calendar-year | |
243 | (concat "\\|" (int-to-string (% year 100))) | |
244 | ""))) | |
245 | (regexp | |
246 | (concat | |
247 | "\\(\\`\\|\^M\\|\n\\)" mark "?" | |
248 | (regexp-quote islamic-diary-entry-symbol) | |
249 | "\\(" | |
250 | (mapconcat 'eval date-form "\\)\\(") | |
251 | "\\)")) | |
252 | (case-fold-search t)) | |
253 | (goto-char (point-min)) | |
254 | (while (re-search-forward regexp nil t) | |
255 | (if backup (re-search-backward "\\<" nil t)) | |
256 | (if (and (or (char-equal (preceding-char) ?\^M) | |
257 | (char-equal (preceding-char) ?\n)) | |
258 | (not (looking-at " \\|\^I"))) | |
259 | ;; Diary entry that consists only of date. | |
260 | (backward-char 1) | |
261 | ;; Found a nonempty diary entry--make it visible and | |
262 | ;; add it to the list. | |
263 | (let ((entry-start (point)) | |
264 | (date-start)) | |
265 | (re-search-backward "\^M\\|\n\\|\\`") | |
266 | (setq date-start (point)) | |
267 | (re-search-forward "\^M\\|\n" nil t 2) | |
268 | (while (looking-at " \\|\^I") | |
269 | (re-search-forward "\^M\\|\n" nil t)) | |
270 | (backward-char 1) | |
271 | (subst-char-in-region date-start (point) ?\^M ?\n t) | |
272 | (add-to-diary-list | |
bfc7bff6 KH |
273 | gdate |
274 | (buffer-substring-no-properties entry-start (point)) | |
275 | (buffer-substring-no-properties | |
48ad4975 GM |
276 | (1+ date-start) (1- entry-start)) |
277 | (copy-marker entry-start)))))) | |
0808d911 ER |
278 | (setq d (cdr d)))) |
279 | (setq gdate | |
280 | (calendar-gregorian-from-absolute | |
281 | (1+ (calendar-absolute-from-gregorian gdate))))) | |
282 | (set-buffer-modified-p diary-modified)) | |
283 | (goto-char (point-min)))) | |
284 | ||
285 | (defun mark-islamic-diary-entries () | |
286 | "Mark days in the calendar window that have Islamic date diary entries. | |
287 | Each entry in diary-file (or included files) visible in the calendar window | |
288 | is marked. Islamic date entries are prefaced by a islamic-diary-entry-symbol | |
289 | \(normally an `I'). The same diary-date-forms govern the style of the Islamic | |
290 | calendar entries, except that the Islamic month names must be spelled in full. | |
291 | The Islamic months are numbered from 1 to 12 with Muharram being 1 and 12 being | |
292 | Dhu al-Hijjah. Islamic date diary entries that begin with a | |
293 | diary-nonmarking-symbol will not be marked in the calendar. This function is | |
294 | provided for use as part of the nongregorian-diary-marking-hook." | |
295 | (let ((d diary-date-forms)) | |
296 | (while d | |
297 | (let* | |
298 | ((date-form (if (equal (car (car d)) 'backup) | |
299 | (cdr (car d)) | |
300 | (car d)));; ignore 'backup directive | |
48ad4975 GM |
301 | (dayname (diary-name-pattern calendar-day-name-array |
302 | calendar-day-abbrev-array)) | |
0808d911 | 303 | (monthname |
48ad4975 GM |
304 | (format "%s\\|\\*" |
305 | (diary-name-pattern calendar-islamic-month-name-array))) | |
0808d911 ER |
306 | (month "[0-9]+\\|\\*") |
307 | (day "[0-9]+\\|\\*") | |
308 | (year "[0-9]+\\|\\*") | |
309 | (l (length date-form)) | |
310 | (d-name-pos (- l (length (memq 'dayname date-form)))) | |
311 | (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos))) | |
312 | (m-name-pos (- l (length (memq 'monthname date-form)))) | |
313 | (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos))) | |
314 | (d-pos (- l (length (memq 'day date-form)))) | |
315 | (d-pos (if (/= l d-pos) (+ 2 d-pos))) | |
316 | (m-pos (- l (length (memq 'month date-form)))) | |
317 | (m-pos (if (/= l m-pos) (+ 2 m-pos))) | |
318 | (y-pos (- l (length (memq 'year date-form)))) | |
319 | (y-pos (if (/= l y-pos) (+ 2 y-pos))) | |
320 | (regexp | |
321 | (concat | |
322 | "\\(\\`\\|\^M\\|\n\\)" | |
323 | (regexp-quote islamic-diary-entry-symbol) | |
324 | "\\(" | |
325 | (mapconcat 'eval date-form "\\)\\(") | |
326 | "\\)")) | |
327 | (case-fold-search t)) | |
328 | (goto-char (point-min)) | |
329 | (while (re-search-forward regexp nil t) | |
330 | (let* ((dd-name | |
331 | (if d-name-pos | |
332 | (buffer-substring | |
333 | (match-beginning d-name-pos) | |
334 | (match-end d-name-pos)))) | |
335 | (mm-name | |
336 | (if m-name-pos | |
337 | (buffer-substring | |
338 | (match-beginning m-name-pos) | |
339 | (match-end m-name-pos)))) | |
340 | (mm (string-to-int | |
341 | (if m-pos | |
342 | (buffer-substring | |
343 | (match-beginning m-pos) | |
344 | (match-end m-pos)) | |
345 | ""))) | |
346 | (dd (string-to-int | |
347 | (if d-pos | |
348 | (buffer-substring | |
349 | (match-beginning d-pos) | |
350 | (match-end d-pos)) | |
351 | ""))) | |
352 | (y-str (if y-pos | |
353 | (buffer-substring | |
354 | (match-beginning y-pos) | |
355 | (match-end y-pos)))) | |
356 | (yy (if (not y-str) | |
357 | 0 | |
358 | (if (and (= (length y-str) 2) | |
359 | abbreviated-calendar-year) | |
360 | (let* ((current-y | |
361 | (extract-calendar-year | |
362 | (calendar-islamic-from-absolute | |
363 | (calendar-absolute-from-gregorian | |
364 | (calendar-current-date))))) | |
365 | (y (+ (string-to-int y-str) | |
366 | (* 100 (/ current-y 100))))) | |
367 | (if (> (- y current-y) 50) | |
368 | (- y 100) | |
369 | (if (> (- current-y y) 50) | |
370 | (+ y 100) | |
371 | y))) | |
372 | (string-to-int y-str))))) | |
373 | (if dd-name | |
374 | (mark-calendar-days-named | |
48ad4975 | 375 | (cdr (assoc-ignore-case dd-name |
77cb2f4c RS |
376 | (calendar-make-alist |
377 | calendar-day-name-array | |
48ad4975 | 378 | 0 nil calendar-day-abbrev-array)))) |
0808d911 | 379 | (if mm-name |
48ad4975 GM |
380 | (setq mm (if (string-equal mm-name "*") 0 |
381 | (cdr (assoc-ignore-case | |
382 | mm-name | |
383 | (calendar-make-alist | |
384 | calendar-islamic-month-name-array)))))) | |
0808d911 ER |
385 | (mark-islamic-calendar-date-pattern mm dd yy))))) |
386 | (setq d (cdr d))))) | |
387 | ||
388 | (defun mark-islamic-calendar-date-pattern (month day year) | |
389 | "Mark dates in calendar window that conform to Islamic date MONTH/DAY/YEAR. | |
390 | A value of 0 in any position is a wildcard." | |
391 | (save-excursion | |
392 | (set-buffer calendar-buffer) | |
393 | (if (and (/= 0 month) (/= 0 day)) | |
394 | (if (/= 0 year) | |
395 | ;; Fully specified Islamic date. | |
396 | (let ((date (calendar-gregorian-from-absolute | |
397 | (calendar-absolute-from-islamic | |
398 | (list month day year))))) | |
399 | (if (calendar-date-is-visible-p date) | |
400 | (mark-visible-calendar-date date))) | |
401 | ;; Month and day in any year--this taken from the holiday stuff. | |
402 | (let* ((islamic-date (calendar-islamic-from-absolute | |
403 | (calendar-absolute-from-gregorian | |
404 | (list displayed-month 15 displayed-year)))) | |
405 | (m (extract-calendar-month islamic-date)) | |
406 | (y (extract-calendar-year islamic-date)) | |
407 | (date)) | |
408 | (if (< m 1) | |
409 | nil;; Islamic calendar doesn't apply. | |
410 | (increment-calendar-month m y (- 10 month)) | |
411 | (if (> m 7);; Islamic date might be visible | |
412 | (let ((date (calendar-gregorian-from-absolute | |
413 | (calendar-absolute-from-islamic | |
414 | (list month day y))))) | |
415 | (if (calendar-date-is-visible-p date) | |
416 | (mark-visible-calendar-date date))))))) | |
417 | ;; Not one of the simple cases--check all visible dates for match. | |
418 | ;; Actually, the following code takes care of ALL of the cases, but | |
419 | ;; it's much too slow to be used for the simple (common) cases. | |
420 | (let ((m displayed-month) | |
421 | (y displayed-year) | |
422 | (first-date) | |
423 | (last-date)) | |
424 | (increment-calendar-month m y -1) | |
425 | (setq first-date | |
426 | (calendar-absolute-from-gregorian | |
427 | (list m 1 y))) | |
428 | (increment-calendar-month m y 2) | |
429 | (setq last-date | |
430 | (calendar-absolute-from-gregorian | |
431 | (list m (calendar-last-day-of-month m y) y))) | |
432 | (calendar-for-loop date from first-date to last-date do | |
433 | (let* ((i-date (calendar-islamic-from-absolute date)) | |
434 | (i-month (extract-calendar-month i-date)) | |
435 | (i-day (extract-calendar-day i-date)) | |
436 | (i-year (extract-calendar-year i-date))) | |
437 | (and (or (zerop month) | |
438 | (= month i-month)) | |
439 | (or (zerop day) | |
440 | (= day i-day)) | |
441 | (or (zerop year) | |
442 | (= year i-year)) | |
443 | (mark-visible-calendar-date | |
444 | (calendar-gregorian-from-absolute date))))))))) | |
445 | ||
446 | (defun insert-islamic-diary-entry (arg) | |
447 | "Insert a diary entry. | |
448 | For the Islamic date corresponding to the date indicated by point. | |
449 | Prefix arg will make the entry nonmarking." | |
450 | (interactive "P") | |
451 | (let* ((calendar-month-name-array calendar-islamic-month-name-array)) | |
452 | (make-diary-entry | |
453 | (concat | |
454 | islamic-diary-entry-symbol | |
a1506d29 | 455 | (calendar-date-string |
0808d911 ER |
456 | (calendar-islamic-from-absolute |
457 | (calendar-absolute-from-gregorian | |
458 | (calendar-cursor-to-date t))) | |
459 | nil t)) | |
460 | arg))) | |
461 | ||
462 | (defun insert-monthly-islamic-diary-entry (arg) | |
463 | "Insert a monthly diary entry. | |
464 | For the day of the Islamic month corresponding to the date indicated by point. | |
465 | Prefix arg will make the entry nonmarking." | |
466 | (interactive "P") | |
467 | (let* ((calendar-date-display-form | |
468 | (if european-calendar-style '(day " * ") '("* " day ))) | |
469 | (calendar-month-name-array calendar-islamic-month-name-array)) | |
470 | (make-diary-entry | |
471 | (concat | |
472 | islamic-diary-entry-symbol | |
a1506d29 | 473 | (calendar-date-string |
0808d911 ER |
474 | (calendar-islamic-from-absolute |
475 | (calendar-absolute-from-gregorian | |
476 | (calendar-cursor-to-date t))))) | |
477 | arg))) | |
478 | ||
479 | (defun insert-yearly-islamic-diary-entry (arg) | |
480 | "Insert an annual diary entry. | |
481 | For the day of the Islamic year corresponding to the date indicated by point. | |
482 | Prefix arg will make the entry nonmarking." | |
483 | (interactive "P") | |
484 | (let* ((calendar-date-display-form | |
485 | (if european-calendar-style | |
486 | '(day " " monthname) | |
487 | '(monthname " " day))) | |
488 | (calendar-month-name-array calendar-islamic-month-name-array)) | |
489 | (make-diary-entry | |
490 | (concat | |
491 | islamic-diary-entry-symbol | |
a1506d29 | 492 | (calendar-date-string |
0808d911 ER |
493 | (calendar-islamic-from-absolute |
494 | (calendar-absolute-from-gregorian | |
495 | (calendar-cursor-to-date t))))) | |
496 | arg))) | |
497 | ||
afdbe61d | 498 | (provide 'cal-islam) |
0808d911 | 499 | |
afdbe61d | 500 | ;;; cal-islam.el ends here |