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1 | ;;; cal-bahai.el --- calendar functions for the Baha'i calendar. |
2 | ||
dbfca9c4 | 3 | ;; Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
811a8484 JW |
4 | |
5 | ;; Author: John Wiegley <johnw@gnu.org> | |
6 | ;; Keywords: calendar | |
7 | ;; Human-Keywords: Baha'i calendar, Baha'i, Bahai, 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 | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
3a35cf56 LK |
23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | ;; Boston, MA 02110-1301, USA. | |
811a8484 JW |
25 | |
26 | ;;; Commentary: | |
27 | ||
28 | ;; This collection of functions implements the features of calendar.el | |
29 | ;; and diary.el that deal with the Baha'i calendar. | |
30 | ||
31 | ;; The Baha'i (http://www.bahai.org) calendar system is based on a | |
32 | ;; solar cycle of 19 months with 19 days each. The four remaining | |
33 | ;; "intercalary" days are called the Ayyam-i-Ha (days of Ha), and are | |
34 | ;; placed between the 18th and 19th months. They are meant as a time | |
35 | ;; of festivals preceding the 19th month, which is the month of | |
36 | ;; fasting. In Gregorian leap years, there are 5 of these days (Ha | |
37 | ;; has the numerical value of 5 in the arabic abjad, or | |
38 | ;; letter-to-number, reckoning). | |
39 | ||
40 | ;; Each month is named after an attribute of God, as are the 19 days | |
41 | ;; -- which have the same names as the months. There is also a name | |
42 | ;; for each year in every 19 year cycle. These cycles are called | |
43 | ;; Vahids. A cycle of 19 Vahids (361 years) is called a Kullu-Shay, | |
44 | ;; which means "all things". | |
45 | ||
46 | ;; The calendar was named the "Badi calendar" by its author, the Bab. | |
47 | ;; It uses a week of seven days, corresponding to the Gregorian week, | |
48 | ;; each of which has its own name, again patterned after the | |
49 | ;; attributes of God. | |
50 | ||
51 | ;; Note: The days of Ayyam-i-Ha are encoded as zero and negative | |
52 | ;; offsets from the first day of the final month. So, (19 -3 157) is | |
53 | ;; the first day of Ayyam-i-Ha, in the year 157 BE. | |
54 | ||
55 | ;;; Code: | |
56 | ||
916f8173 JB |
57 | (defvar date) |
58 | (defvar displayed-month) | |
59 | (defvar displayed-year) | |
60 | (defvar number) | |
61 | (defvar original-date) | |
62 | ||
811a8484 JW |
63 | (require 'cal-julian) |
64 | ||
65 | (defvar bahai-calendar-month-name-array | |
66 | ["Baha" "Jalal" "Jamal" "`Azamat" "Nur" "Rahmat" "Kalimat" "Kamal" | |
67 | "Asma" "`Izzat" "Mashiyyat" "`Ilm" "Qudrat" "Qawl" "Masa'il" | |
68 | "Sharaf" "Sultan" "Mulk" "`Ala"]) | |
69 | ||
70 | (defvar calendar-bahai-epoch (calendar-absolute-from-gregorian '(3 21 1844)) | |
71 | "Absolute date of start of Baha'i calendar = March 19, 622 A.D. (Julian).") | |
72 | ||
73 | (defun bahai-calendar-leap-year-p (year) | |
74 | "True if YEAR is a leap year on the Baha'i calendar." | |
75 | (calendar-leap-year-p (+ year 1844))) | |
76 | ||
77 | (defvar bahai-calendar-leap-base | |
78 | (+ (/ 1844 4) (- (/ 1844 100)) (/ 1844 400))) | |
79 | ||
80 | (defun calendar-absolute-from-bahai (date) | |
81 | "Compute absolute date from Baha'i date DATE. | |
82 | The absolute date is the number of days elapsed since the (imaginary) | |
83 | Gregorian date Sunday, December 31, 1 BC." | |
84 | (let* ((month (extract-calendar-month date)) | |
85 | (day (extract-calendar-day date)) | |
86 | (year (extract-calendar-year date)) | |
87 | (prior-years (+ (1- year) 1844)) | |
88 | (leap-days (- (+ (/ prior-years 4) ; Leap days in prior years. | |
89 | (- (/ prior-years 100)) | |
90 | (/ prior-years 400)) | |
91 | bahai-calendar-leap-base))) | |
92 | (+ (1- calendar-bahai-epoch) ; Days before epoch | |
93 | (* 365 (1- year)) ; Days in prior years. | |
94 | leap-days | |
95 | (calendar-sum m 1 (< m month) 19) | |
96 | (if (= month 19) 4 0) | |
97 | day))) ; Days so far this month. | |
98 | ||
99 | (defun calendar-bahai-from-absolute (date) | |
100 | "Baha'i year corresponding to the absolute DATE." | |
101 | (if (< date calendar-bahai-epoch) | |
102 | (list 0 0 0) ;; pre-Baha'i date | |
103 | (let* ((greg (calendar-gregorian-from-absolute date)) | |
104 | (year (+ (- (extract-calendar-year greg) 1844) | |
105 | (if (or (> (extract-calendar-month greg) 3) | |
106 | (and (= (extract-calendar-month greg) 3) | |
107 | (>= (extract-calendar-day greg) 21))) | |
108 | 1 0))) | |
109 | (month ;; Search forward from Baha. | |
110 | (1+ (calendar-sum m 1 | |
111 | (> date | |
112 | (calendar-absolute-from-bahai | |
113 | (list m 19 year))) | |
114 | 1))) | |
115 | (day ;; Calculate the day by subtraction. | |
116 | (- date | |
117 | (1- (calendar-absolute-from-bahai (list month 1 year)))))) | |
118 | (list month day year)))) | |
119 | ||
120 | (defun calendar-bahai-date-string (&optional date) | |
121 | "String of Baha'i date of Gregorian DATE. | |
122 | Defaults to today's date if DATE is not given." | |
123 | (let* ((bahai-date (calendar-bahai-from-absolute | |
124 | (calendar-absolute-from-gregorian | |
125 | (or date (calendar-current-date))))) | |
126 | (y (extract-calendar-year bahai-date)) | |
127 | (m (extract-calendar-month bahai-date)) | |
128 | (d (extract-calendar-day bahai-date))) | |
129 | (let ((monthname | |
130 | (if (and (= m 19) | |
131 | (<= d 0)) | |
132 | "Ayyam-i-Ha" | |
133 | (aref bahai-calendar-month-name-array (1- m)))) | |
134 | (day (int-to-string | |
135 | (if (<= d 0) | |
136 | (if (bahai-calendar-leap-year-p y) | |
137 | (+ d 5) | |
138 | (+ d 4)) | |
139 | d))) | |
140 | (dayname nil) | |
141 | (month (int-to-string m)) | |
142 | (year (int-to-string y))) | |
143 | (mapconcat 'eval calendar-date-display-form "")))) | |
144 | ||
145 | (defun calendar-print-bahai-date () | |
146 | "Show the Baha'i calendar equivalent of the selected date." | |
147 | (interactive) | |
148 | (message "Baha'i date: %s" | |
149 | (calendar-bahai-date-string (calendar-cursor-to-date t)))) | |
150 | ||
151 | (defun calendar-goto-bahai-date (date &optional noecho) | |
152 | "Move cursor to Baha'i date DATE. | |
153 | Echo Baha'i date unless NOECHO is t." | |
154 | (interactive (bahai-prompt-for-date)) | |
155 | (calendar-goto-date (calendar-gregorian-from-absolute | |
156 | (calendar-absolute-from-bahai date))) | |
157 | (or noecho (calendar-print-bahai-date))) | |
158 | ||
159 | (defun bahai-prompt-for-date () | |
160 | "Ask for a Baha'i date." | |
161 | (let* ((today (calendar-current-date)) | |
162 | (year (calendar-read | |
163 | "Baha'i calendar year (not 0): " | |
164 | '(lambda (x) (/= x 0)) | |
165 | (int-to-string | |
166 | (extract-calendar-year | |
167 | (calendar-bahai-from-absolute | |
168 | (calendar-absolute-from-gregorian today)))))) | |
169 | (completion-ignore-case t) | |
170 | (month (cdr (assoc | |
171 | (completing-read | |
172 | "Baha'i calendar month name: " | |
173 | (mapcar 'list | |
174 | (append bahai-calendar-month-name-array nil)) | |
175 | nil t) | |
176 | (calendar-make-alist bahai-calendar-month-name-array | |
177 | 1)))) | |
178 | (day (calendar-read "Baha'i calendar day (1-19): " | |
179 | '(lambda (x) (and (< 0 x) (<= x 19)))))) | |
180 | (list (list month day year)))) | |
181 | ||
182 | (defun diary-bahai-date () | |
183 | "Baha'i calendar equivalent of date diary entry." | |
184 | (format "Baha'i date: %s" (calendar-bahai-date-string date))) | |
185 | ||
186 | (defun holiday-bahai (month day string) | |
187 | "Holiday on MONTH, DAY (Baha'i) called STRING. | |
188 | If MONTH, DAY (Baha'i) is visible, the value returned is corresponding | |
189 | Gregorian date in the form of the list (((month day year) STRING)). Returns | |
190 | nil if it is not visible in the current calendar window." | |
191 | (let* ((bahai-date (calendar-bahai-from-absolute | |
192 | (calendar-absolute-from-gregorian | |
193 | (list displayed-month 15 displayed-year)))) | |
194 | (m (extract-calendar-month bahai-date)) | |
195 | (y (extract-calendar-year bahai-date)) | |
196 | (date)) | |
197 | (if (< m 1) | |
198 | nil ;; Baha'i calendar doesn't apply. | |
199 | (increment-calendar-month m y (- 10 month)) | |
200 | (if (> m 7) ;; Baha'i date might be visible | |
201 | (let ((date (calendar-gregorian-from-absolute | |
202 | (calendar-absolute-from-bahai (list month day y))))) | |
203 | (if (calendar-date-is-visible-p date) | |
204 | (list (list date string)))))))) | |
205 | ||
206 | (defun list-bahai-diary-entries () | |
207 | "Add any Baha'i date entries from the diary file to `diary-entries-list'. | |
208 | Baha'i date diary entries must be prefaced by an | |
209 | `bahai-diary-entry-symbol' (normally a `B'). The same diary date | |
210 | forms govern the style of the Baha'i calendar entries, except that the | |
211 | Baha'i month names must be given numerically. The Baha'i months are | |
212 | numbered from 1 to 19 with Baha being 1 and 19 being `Ala. If a | |
213 | Baha'i date diary entry begins with a `diary-nonmarking-symbol', the | |
214 | entry will appear in the diary listing, but will not be marked in the | |
215 | calendar. This function is provided for use with the | |
216 | `nongregorian-diary-listing-hook'." | |
217 | (if (< 0 number) | |
218 | (let ((buffer-read-only nil) | |
219 | (diary-modified (buffer-modified-p)) | |
220 | (gdate original-date) | |
221 | (mark (regexp-quote diary-nonmarking-symbol))) | |
222 | (calendar-for-loop i from 1 to number do | |
223 | (let* ((d diary-date-forms) | |
916f8173 | 224 | (bdate (calendar-bahai-from-absolute |
811a8484 JW |
225 | (calendar-absolute-from-gregorian gdate))) |
226 | (month (extract-calendar-month bdate)) | |
227 | (day (extract-calendar-day bdate)) | |
228 | (year (extract-calendar-year bdate))) | |
229 | (while d | |
230 | (let* | |
231 | ((date-form (if (equal (car (car d)) 'backup) | |
232 | (cdr (car d)) | |
233 | (car d))) | |
234 | (backup (equal (car (car d)) 'backup)) | |
235 | (dayname | |
236 | (concat | |
237 | (calendar-day-name gdate) "\\|" | |
238 | (substring (calendar-day-name gdate) 0 3) ".?")) | |
239 | (calendar-month-name-array | |
240 | bahai-calendar-month-name-array) | |
241 | (monthname | |
242 | (concat | |
243 | "\\*\\|" | |
244 | (calendar-month-name month))) | |
245 | (month (concat "\\*\\|0*" (int-to-string month))) | |
246 | (day (concat "\\*\\|0*" (int-to-string day))) | |
247 | (year | |
248 | (concat | |
249 | "\\*\\|0*" (int-to-string year) | |
250 | (if abbreviated-calendar-year | |
251 | (concat "\\|" (int-to-string (% year 100))) | |
252 | ""))) | |
253 | (regexp | |
254 | (concat | |
255 | "\\(\\`\\|\^M\\|\n\\)" mark "?" | |
256 | (regexp-quote bahai-diary-entry-symbol) | |
257 | "\\(" | |
258 | (mapconcat 'eval date-form "\\)\\(") | |
259 | "\\)")) | |
260 | (case-fold-search t)) | |
261 | (goto-char (point-min)) | |
262 | (while (re-search-forward regexp nil t) | |
263 | (if backup (re-search-backward "\\<" nil t)) | |
264 | (if (and (or (char-equal (preceding-char) ?\^M) | |
265 | (char-equal (preceding-char) ?\n)) | |
266 | (not (looking-at " \\|\^I"))) | |
267 | ;; Diary entry that consists only of date. | |
268 | (backward-char 1) | |
269 | ;; Found a nonempty diary entry--make it visible and | |
270 | ;; add it to the list. | |
271 | (let ((entry-start (point)) | |
272 | (date-start)) | |
273 | (re-search-backward "\^M\\|\n\\|\\`") | |
274 | (setq date-start (point)) | |
275 | (re-search-forward "\^M\\|\n" nil t 2) | |
276 | (while (looking-at " \\|\^I") | |
277 | (re-search-forward "\^M\\|\n" nil t)) | |
278 | (backward-char 1) | |
279 | (subst-char-in-region date-start (point) ?\^M ?\n t) | |
280 | (add-to-diary-list | |
281 | gdate | |
282 | (buffer-substring-no-properties entry-start (point)) | |
283 | (buffer-substring-no-properties | |
284 | (1+ date-start) (1- entry-start))))))) | |
285 | (setq d (cdr d)))) | |
286 | (setq gdate | |
287 | (calendar-gregorian-from-absolute | |
288 | (1+ (calendar-absolute-from-gregorian gdate))))) | |
289 | (set-buffer-modified-p diary-modified)) | |
290 | (goto-char (point-min)))) | |
291 | ||
292 | (defun mark-bahai-diary-entries () | |
293 | "Mark days in the calendar window that have Baha'i date diary entries. | |
294 | Each entry in diary-file (or included files) visible in the calendar | |
295 | window is marked. Baha'i date entries are prefaced by a | |
296 | bahai-diary-entry-symbol \(normally a B`I'). The same | |
297 | diary-date-forms govern the style of the Baha'i calendar entries, | |
298 | except that the Baha'i month names must be spelled in full. The | |
299 | Baha'i months are numbered from 1 to 12 with Baha being 1 and 12 being | |
300 | `Ala. Baha'i date diary entries that begin with a | |
301 | diary-nonmarking-symbol will not be marked in the calendar. This | |
302 | function is provided for use as part of the | |
303 | nongregorian-diary-marking-hook." | |
304 | (let ((d diary-date-forms)) | |
305 | (while d | |
306 | (let* | |
307 | ((date-form (if (equal (car (car d)) 'backup) | |
308 | (cdr (car d)) | |
309 | (car d)));; ignore 'backup directive | |
310 | (dayname (diary-name-pattern calendar-day-name-array)) | |
311 | (monthname | |
312 | (concat | |
313 | (diary-name-pattern bahai-calendar-month-name-array t) | |
314 | "\\|\\*")) | |
315 | (month "[0-9]+\\|\\*") | |
316 | (day "[0-9]+\\|\\*") | |
317 | (year "[0-9]+\\|\\*") | |
318 | (l (length date-form)) | |
319 | (d-name-pos (- l (length (memq 'dayname date-form)))) | |
320 | (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos))) | |
321 | (m-name-pos (- l (length (memq 'monthname date-form)))) | |
322 | (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos))) | |
323 | (d-pos (- l (length (memq 'day date-form)))) | |
324 | (d-pos (if (/= l d-pos) (+ 2 d-pos))) | |
325 | (m-pos (- l (length (memq 'month date-form)))) | |
326 | (m-pos (if (/= l m-pos) (+ 2 m-pos))) | |
327 | (y-pos (- l (length (memq 'year date-form)))) | |
328 | (y-pos (if (/= l y-pos) (+ 2 y-pos))) | |
329 | (regexp | |
330 | (concat | |
331 | "\\(\\`\\|\^M\\|\n\\)" | |
332 | (regexp-quote bahai-diary-entry-symbol) | |
333 | "\\(" | |
334 | (mapconcat 'eval date-form "\\)\\(") | |
335 | "\\)")) | |
336 | (case-fold-search t)) | |
337 | (goto-char (point-min)) | |
338 | (while (re-search-forward regexp nil t) | |
339 | (let* ((dd-name | |
340 | (if d-name-pos | |
341 | (buffer-substring | |
342 | (match-beginning d-name-pos) | |
343 | (match-end d-name-pos)))) | |
344 | (mm-name | |
345 | (if m-name-pos | |
346 | (buffer-substring | |
347 | (match-beginning m-name-pos) | |
348 | (match-end m-name-pos)))) | |
027a4b6b | 349 | (mm (string-to-number |
811a8484 JW |
350 | (if m-pos |
351 | (buffer-substring | |
352 | (match-beginning m-pos) | |
353 | (match-end m-pos)) | |
354 | ""))) | |
027a4b6b | 355 | (dd (string-to-number |
811a8484 JW |
356 | (if d-pos |
357 | (buffer-substring | |
358 | (match-beginning d-pos) | |
359 | (match-end d-pos)) | |
360 | ""))) | |
361 | (y-str (if y-pos | |
362 | (buffer-substring | |
363 | (match-beginning y-pos) | |
364 | (match-end y-pos)))) | |
365 | (yy (if (not y-str) | |
366 | 0 | |
367 | (if (and (= (length y-str) 2) | |
368 | abbreviated-calendar-year) | |
369 | (let* ((current-y | |
370 | (extract-calendar-year | |
371 | (calendar-bahai-from-absolute | |
372 | (calendar-absolute-from-gregorian | |
373 | (calendar-current-date))))) | |
027a4b6b | 374 | (y (+ (string-to-number y-str) |
811a8484 JW |
375 | (* 100 (/ current-y 100))))) |
376 | (if (> (- y current-y) 50) | |
377 | (- y 100) | |
378 | (if (> (- current-y y) 50) | |
379 | (+ y 100) | |
380 | y))) | |
027a4b6b | 381 | (string-to-number y-str))))) |
811a8484 JW |
382 | (if dd-name |
383 | (mark-calendar-days-named | |
59d8fe2e JB |
384 | (cdr (assoc-string (substring dd-name 0 3) |
385 | (calendar-make-alist | |
386 | calendar-day-name-array | |
387 | 0 | |
388 | '(lambda (x) (substring x 0 3))) | |
389 | t))) | |
811a8484 JW |
390 | (if mm-name |
391 | (if (string-equal mm-name "*") | |
392 | (setq mm 0) | |
393 | (setq mm | |
59d8fe2e | 394 | (cdr (assoc-string |
811a8484 JW |
395 | mm-name |
396 | (calendar-make-alist | |
59d8fe2e JB |
397 | bahai-calendar-month-name-array) |
398 | t))))) | |
811a8484 JW |
399 | (mark-bahai-calendar-date-pattern mm dd yy))))) |
400 | (setq d (cdr d))))) | |
401 | ||
402 | (defun mark-bahai-calendar-date-pattern (month day year) | |
403 | "Mark dates in calendar window that conform to Baha'i date MONTH/DAY/YEAR. | |
404 | A value of 0 in any position is a wildcard." | |
405 | (save-excursion | |
406 | (set-buffer calendar-buffer) | |
407 | (if (and (/= 0 month) (/= 0 day)) | |
408 | (if (/= 0 year) | |
409 | ;; Fully specified Baha'i date. | |
410 | (let ((date (calendar-gregorian-from-absolute | |
411 | (calendar-absolute-from-bahai | |
412 | (list month day year))))) | |
413 | (if (calendar-date-is-visible-p date) | |
414 | (mark-visible-calendar-date date))) | |
415 | ;; Month and day in any year--this taken from the holiday stuff. | |
416 | (let* ((bahai-date (calendar-bahai-from-absolute | |
417 | (calendar-absolute-from-gregorian | |
418 | (list displayed-month 15 displayed-year)))) | |
419 | (m (extract-calendar-month bahai-date)) | |
420 | (y (extract-calendar-year bahai-date)) | |
421 | (date)) | |
422 | (if (< m 1) | |
423 | nil;; Baha'i calendar doesn't apply. | |
424 | (increment-calendar-month m y (- 10 month)) | |
425 | (if (> m 7);; Baha'i date might be visible | |
426 | (let ((date (calendar-gregorian-from-absolute | |
427 | (calendar-absolute-from-bahai | |
428 | (list month day y))))) | |
429 | (if (calendar-date-is-visible-p date) | |
430 | (mark-visible-calendar-date date))))))) | |
431 | ;; Not one of the simple cases--check all visible dates for match. | |
432 | ;; Actually, the following code takes care of ALL of the cases, but | |
433 | ;; it's much too slow to be used for the simple (common) cases. | |
434 | (let ((m displayed-month) | |
435 | (y displayed-year) | |
436 | (first-date) | |
437 | (last-date)) | |
438 | (increment-calendar-month m y -1) | |
439 | (setq first-date | |
440 | (calendar-absolute-from-gregorian | |
441 | (list m 1 y))) | |
442 | (increment-calendar-month m y 2) | |
443 | (setq last-date | |
444 | (calendar-absolute-from-gregorian | |
445 | (list m (calendar-last-day-of-month m y) y))) | |
446 | (calendar-for-loop date from first-date to last-date do | |
447 | (let* ((b-date (calendar-bahai-from-absolute date)) | |
448 | (i-month (extract-calendar-month b-date)) | |
449 | (i-day (extract-calendar-day b-date)) | |
450 | (i-year (extract-calendar-year b-date))) | |
451 | (and (or (zerop month) | |
452 | (= month i-month)) | |
453 | (or (zerop day) | |
454 | (= day i-day)) | |
455 | (or (zerop year) | |
456 | (= year i-year)) | |
457 | (mark-visible-calendar-date | |
458 | (calendar-gregorian-from-absolute date))))))))) | |
459 | ||
460 | (defun insert-bahai-diary-entry (arg) | |
461 | "Insert a diary entry. | |
462 | For the Baha'i date corresponding to the date indicated by point. | |
463 | Prefix arg will make the entry nonmarking." | |
464 | (interactive "P") | |
465 | (let* ((calendar-month-name-array bahai-calendar-month-name-array)) | |
466 | (make-diary-entry | |
467 | (concat | |
468 | bahai-diary-entry-symbol | |
916f8173 | 469 | (calendar-date-string |
811a8484 JW |
470 | (calendar-bahai-from-absolute |
471 | (calendar-absolute-from-gregorian | |
472 | (calendar-cursor-to-date t))) | |
473 | nil t)) | |
474 | arg))) | |
475 | ||
476 | (defun insert-monthly-bahai-diary-entry (arg) | |
477 | "Insert a monthly diary entry. | |
478 | For the day of the Baha'i month corresponding to the date indicated by point. | |
479 | Prefix arg will make the entry nonmarking." | |
480 | (interactive "P") | |
481 | (let* ((calendar-date-display-form | |
482 | (if european-calendar-style '(day " * ") '("* " day ))) | |
483 | (calendar-month-name-array bahai-calendar-month-name-array)) | |
484 | (make-diary-entry | |
485 | (concat | |
486 | bahai-diary-entry-symbol | |
916f8173 | 487 | (calendar-date-string |
811a8484 JW |
488 | (calendar-bahai-from-absolute |
489 | (calendar-absolute-from-gregorian | |
490 | (calendar-cursor-to-date t))))) | |
491 | arg))) | |
492 | ||
493 | (defun insert-yearly-bahai-diary-entry (arg) | |
494 | "Insert an annual diary entry. | |
495 | For the day of the Baha'i year corresponding to the date indicated by point. | |
496 | Prefix arg will make the entry nonmarking." | |
497 | (interactive "P") | |
498 | (let* ((calendar-date-display-form | |
499 | (if european-calendar-style | |
500 | '(day " " monthname) | |
501 | '(monthname " " day))) | |
502 | (calendar-month-name-array bahai-calendar-month-name-array)) | |
503 | (make-diary-entry | |
504 | (concat | |
505 | bahai-diary-entry-symbol | |
916f8173 | 506 | (calendar-date-string |
811a8484 JW |
507 | (calendar-bahai-from-absolute |
508 | (calendar-absolute-from-gregorian | |
509 | (calendar-cursor-to-date t))))) | |
510 | arg))) | |
511 | ||
512 | (provide 'cal-bahai) | |
513 | ||
88e15d0e | 514 | ;;; arch-tag: c1cb1d67-862a-4264-a01c-41cb4df01f14 |
811a8484 | 515 | ;;; cal-bahai.el ends here |