See ChangeLog

5 files changed, 685 insertions, 48 deletions

diff --git a/lisp/calendar/cal-bahai.el b/lisp/calendar/cal-bahai.el
new file mode 100644
index 00000000000..3789bb7abc7
--- /dev/null
+++ b/lisp/calendar/cal-bahai.el
@@ -0,0 +1,486 @@
+;;; cal-bahai.el --- calendar functions for the Baha'i calendar.
+
+;; Copyright (C) 2001 Free Software Foundation, Inc.
+
+;; Author: John Wiegley <johnw@gnu.org>
+;; Keywords: calendar
+;; Human-Keywords: Baha'i calendar, Baha'i, Bahai, calendar, diary
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; This collection of functions implements the features of calendar.el
+;; and diary.el that deal with the Baha'i calendar.
+
+;; Note: The days of Ayyam-i-Ha are encoded as zero and negative
+;; offsets from the first day of the final month.  So, (19 -3 157) is
+;; the first day of Ayyam-i-Ha, in the year 157 BE.
+
+;;; Code:
+
+(require 'cal-julian)
+
+(defvar bahai-calendar-month-name-array
+  ["Baha" "Jalal" "Jamal" "`Azamat" "Nur" "Rahmat" "Kalimat" "Kamal"
+   "Asma" "`Izzat" "Mashiyyat" "`Ilm" "Qudrat" "Qawl" "Masa'il"
+   "Sharaf" "Sultan" "Mulk" "`Ala"])
+
+(defvar calendar-bahai-epoch (calendar-absolute-from-gregorian '(3 21 1844))
+  "Absolute date of start of Baha'i calendar = March 19, 622 A.D. (Julian).")
+
+(defun bahai-calendar-leap-year-p (year)
+  "True if YEAR is a leap year on the Baha'i calendar."
+  (calendar-leap-year-p (+ year 1844)))
+
+(defvar bahai-calendar-leap-base
+  (+ (/ 1844 4) (- (/ 1844 100)) (/ 1844 400)))
+
+(defun calendar-absolute-from-bahai (date)
+  "Compute absolute date from Baha'i date DATE.
+The absolute date is the number of days elapsed since the (imaginary)
+Gregorian date Sunday, December 31, 1 BC."
+  (let* ((month (extract-calendar-month date))
+	 (day (extract-calendar-day date))
+	 (year (extract-calendar-year date))
+	 (prior-years (+ (1- year) 1844))
+	 (leap-days (- (+ (/ prior-years 4) ; Leap days in prior years.
+			  (- (/ prior-years 100))
+			  (/ prior-years 400))
+		       bahai-calendar-leap-base)))
+    (+ (1- calendar-bahai-epoch)	; Days before epoch
+       (* 365 (1- year))		; Days in prior years.
+       leap-days
+       (calendar-sum m 1 (< m month) 19)
+       (if (= month 19) 4 0)
+       day)))				; Days so far this month.
+
+(defun calendar-bahai-from-absolute (date)
+  "Baha'i year corresponding to the absolute DATE."
+  (if (< date calendar-bahai-epoch)
+      (list 0 0 0) ;; pre-Baha'i date
+    (let* ((greg (calendar-gregorian-from-absolute date))
+	   (year (+ (- (extract-calendar-year greg) 1844)
+		    (if (or (> (extract-calendar-month greg) 3)
+			    (and (= (extract-calendar-month greg) 3)
+				 (>= (extract-calendar-day greg) 21)))
+			1 0)))
+           (month ;; Search forward from Baha.
+            (1+ (calendar-sum m 1
+			      (> date
+				 (calendar-absolute-from-bahai
+				  (list m 19 year)))
+			      1)))
+           (day	;; Calculate the day by subtraction.
+            (- date
+               (1- (calendar-absolute-from-bahai (list month 1 year))))))
+      (list month day year))))
+
+(defun calendar-bahai-date-string (&optional date)
+  "String of Baha'i date of Gregorian DATE.
+Defaults to today's date if DATE is not given."
+  (let* ((bahai-date (calendar-bahai-from-absolute
+                       (calendar-absolute-from-gregorian
+                        (or date (calendar-current-date)))))
+         (y (extract-calendar-year bahai-date))
+         (m (extract-calendar-month bahai-date))
+         (d (extract-calendar-day bahai-date)))
+    (let ((monthname
+	   (if (and (= m 19)
+		    (<= d 0))
+	       "Ayyam-i-Ha"
+	     (aref bahai-calendar-month-name-array (1- m))))
+	  (day (int-to-string
+		(if (<= d 0)
+		    (if (bahai-calendar-leap-year-p y)
+			(+ d 5)
+		      (+ d 4))
+		  d)))
+	  (dayname nil)
+	  (month (int-to-string m))
+	  (year (int-to-string y)))
+      (mapconcat 'eval calendar-date-display-form ""))))
+
+(defun calendar-print-bahai-date ()
+  "Show the Baha'i calendar equivalent of the selected date."
+  (interactive)
+  (message "Baha'i date: %s"
+           (calendar-bahai-date-string (calendar-cursor-to-date t))))
+
+(defun calendar-goto-bahai-date (date &optional noecho)
+  "Move cursor to Baha'i date DATE.
+Echo Baha'i date unless NOECHO is t."
+  (interactive (bahai-prompt-for-date))
+  (calendar-goto-date (calendar-gregorian-from-absolute
+                       (calendar-absolute-from-bahai date)))
+  (or noecho (calendar-print-bahai-date)))
+
+(defun bahai-prompt-for-date ()
+  "Ask for a Baha'i date."
+  (let* ((today (calendar-current-date))
+         (year (calendar-read
+                "Baha'i calendar year (not 0): "
+                '(lambda (x) (/= x 0))
+                (int-to-string
+                 (extract-calendar-year
+                  (calendar-bahai-from-absolute
+                   (calendar-absolute-from-gregorian today))))))
+         (completion-ignore-case t)
+         (month (cdr (assoc
+                       (completing-read
+                        "Baha'i calendar month name: "
+                        (mapcar 'list
+                                (append bahai-calendar-month-name-array nil))
+                        nil t)
+                      (calendar-make-alist bahai-calendar-month-name-array
+                                           1))))
+         (day (calendar-read "Baha'i calendar day (1-19): "
+			     '(lambda (x) (and (< 0 x) (<= x 19))))))
+    (list (list month day year))))
+
+(defun diary-bahai-date ()
+  "Baha'i calendar equivalent of date diary entry."
+  (format "Baha'i date: %s" (calendar-bahai-date-string date)))
+
+(defun holiday-bahai (month day string)
+  "Holiday on MONTH, DAY (Baha'i) called STRING.
+If MONTH, DAY (Baha'i) is visible, the value returned is corresponding
+Gregorian date in the form of the list (((month day year) STRING)).  Returns
+nil if it is not visible in the current calendar window."
+  (let* ((bahai-date (calendar-bahai-from-absolute
+		      (calendar-absolute-from-gregorian
+		       (list displayed-month 15 displayed-year))))
+         (m (extract-calendar-month bahai-date))
+         (y (extract-calendar-year bahai-date))
+	 (date))
+    (if (< m 1)
+        nil ;;   Baha'i calendar doesn't apply.
+      (increment-calendar-month m y (- 10 month))
+      (if (> m 7) ;;  Baha'i date might be visible
+          (let ((date (calendar-gregorian-from-absolute
+                       (calendar-absolute-from-bahai (list month day y)))))
+            (if (calendar-date-is-visible-p date)
+                (list (list date string))))))))
+
+(defun list-bahai-diary-entries ()
+  "Add any Baha'i date entries from the diary file to `diary-entries-list'.
+Baha'i date diary entries must be prefaced by an
+`bahai-diary-entry-symbol' (normally a `B').  The same diary date
+forms govern the style of the Baha'i calendar entries, except that the
+Baha'i month names must be given numerically.  The Baha'i months are
+numbered from 1 to 19 with Baha being 1 and 19 being `Ala.  If a
+Baha'i date diary entry begins with a `diary-nonmarking-symbol', the
+entry will appear in the diary listing, but will not be marked in the
+calendar.  This function is provided for use with the
+`nongregorian-diary-listing-hook'."
+  (if (< 0 number)
+      (let ((buffer-read-only nil)
+            (diary-modified (buffer-modified-p))
+            (gdate original-date)
+            (mark (regexp-quote diary-nonmarking-symbol)))
+        (calendar-for-loop i from 1 to number do
+           (let* ((d diary-date-forms)
+                  (bdate (calendar-bahai-from-absolute 
+                          (calendar-absolute-from-gregorian gdate)))
+                  (month (extract-calendar-month bdate))
+                  (day (extract-calendar-day bdate))
+                  (year (extract-calendar-year bdate)))
+             (while d
+               (let*
+                   ((date-form (if (equal (car (car d)) 'backup)
+                                   (cdr (car d))
+                                 (car d)))
+                    (backup (equal (car (car d)) 'backup))
+                    (dayname
+                     (concat
+                      (calendar-day-name gdate) "\\|"
+                      (substring (calendar-day-name gdate) 0 3) ".?"))
+                    (calendar-month-name-array
+                     bahai-calendar-month-name-array)
+                    (monthname
+                     (concat
+                      "\\*\\|"
+                      (calendar-month-name month)))
+                    (month (concat "\\*\\|0*" (int-to-string month)))
+                    (day (concat "\\*\\|0*" (int-to-string day)))
+                    (year
+                     (concat
+                      "\\*\\|0*" (int-to-string year)
+                      (if abbreviated-calendar-year
+                          (concat "\\|" (int-to-string (% year 100)))
+                        "")))
+                    (regexp
+                     (concat
+                      "\\(\\`\\|\^M\\|\n\\)" mark "?"
+                      (regexp-quote bahai-diary-entry-symbol)
+                      "\\("
+                      (mapconcat 'eval date-form "\\)\\(")
+                      "\\)"))
+                    (case-fold-search t))
+                 (goto-char (point-min))
+                 (while (re-search-forward regexp nil t)
+                   (if backup (re-search-backward "\\<" nil t))
+                   (if (and (or (char-equal (preceding-char) ?\^M)
+                                (char-equal (preceding-char) ?\n))
+                            (not (looking-at " \\|\^I")))
+                       ;;  Diary entry that consists only of date.
+                       (backward-char 1)
+                     ;;  Found a nonempty diary entry--make it visible and
+                     ;;  add it to the list.
+                     (let ((entry-start (point))
+                           (date-start))
+                       (re-search-backward "\^M\\|\n\\|\\`")
+                       (setq date-start (point))
+                       (re-search-forward "\^M\\|\n" nil t 2)
+                       (while (looking-at " \\|\^I")
+                         (re-search-forward "\^M\\|\n" nil t))
+                       (backward-char 1)
+                       (subst-char-in-region date-start (point) ?\^M ?\n t)
+                       (add-to-diary-list
+                        gdate
+                        (buffer-substring-no-properties entry-start (point))
+                        (buffer-substring-no-properties
+                         (1+ date-start) (1- entry-start)))))))
+               (setq d (cdr d))))
+           (setq gdate
+                 (calendar-gregorian-from-absolute
+                  (1+ (calendar-absolute-from-gregorian gdate)))))
+           (set-buffer-modified-p diary-modified))
+        (goto-char (point-min))))
+
+(defun mark-bahai-diary-entries ()
+  "Mark days in the calendar window that have Baha'i date diary entries.
+Each entry in diary-file (or included files) visible in the calendar
+window is marked.  Baha'i date entries are prefaced by a
+bahai-diary-entry-symbol \(normally a B`I').  The same
+diary-date-forms govern the style of the Baha'i calendar entries,
+except that the Baha'i month names must be spelled in full.  The
+Baha'i months are numbered from 1 to 12 with Baha being 1 and 12 being
+`Ala.  Baha'i date diary entries that begin with a
+diary-nonmarking-symbol will not be marked in the calendar.  This
+function is provided for use as part of the
+nongregorian-diary-marking-hook."
+  (let ((d diary-date-forms))
+    (while d
+      (let*
+          ((date-form (if (equal (car (car d)) 'backup)
+                          (cdr (car d))
+                        (car d)));; ignore 'backup directive
+           (dayname (diary-name-pattern calendar-day-name-array))
+           (monthname
+            (concat
+             (diary-name-pattern bahai-calendar-month-name-array t)
+             "\\|\\*"))
+           (month "[0-9]+\\|\\*")
+           (day "[0-9]+\\|\\*")
+           (year "[0-9]+\\|\\*")
+           (l (length date-form))
+           (d-name-pos (- l (length (memq 'dayname date-form))))
+           (d-name-pos (if (/= l d-name-pos) (+ 2 d-name-pos)))
+           (m-name-pos (- l (length (memq 'monthname date-form))))
+           (m-name-pos (if (/= l m-name-pos) (+ 2 m-name-pos)))
+           (d-pos (- l (length (memq 'day date-form))))
+           (d-pos (if (/= l d-pos) (+ 2 d-pos)))
+           (m-pos (- l (length (memq 'month date-form))))
+           (m-pos (if (/= l m-pos) (+ 2 m-pos)))
+           (y-pos (- l (length (memq 'year date-form))))
+           (y-pos (if (/= l y-pos) (+ 2 y-pos)))
+           (regexp
+            (concat
+             "\\(\\`\\|\^M\\|\n\\)"
+             (regexp-quote bahai-diary-entry-symbol)
+             "\\("
+             (mapconcat 'eval date-form "\\)\\(")
+             "\\)"))
+           (case-fold-search t))
+        (goto-char (point-min))
+        (while (re-search-forward regexp nil t)
+          (let* ((dd-name
+                  (if d-name-pos
+                      (buffer-substring
+                       (match-beginning d-name-pos)
+                       (match-end d-name-pos))))
+                 (mm-name
+                  (if m-name-pos
+                      (buffer-substring
+                       (match-beginning m-name-pos)
+                       (match-end m-name-pos))))
+                 (mm (string-to-int
+                      (if m-pos
+                          (buffer-substring
+                           (match-beginning m-pos)
+                           (match-end m-pos))
+                        "")))
+                 (dd (string-to-int
+                      (if d-pos
+                          (buffer-substring
+                           (match-beginning d-pos)
+                           (match-end d-pos))
+                        "")))
+                 (y-str (if y-pos
+                            (buffer-substring
+                             (match-beginning y-pos)
+                             (match-end y-pos))))
+                 (yy (if (not y-str)
+                         0
+                       (if (and (= (length y-str) 2)
+                                abbreviated-calendar-year)
+                           (let* ((current-y
+                                   (extract-calendar-year
+                                    (calendar-bahai-from-absolute
+                                     (calendar-absolute-from-gregorian
+                                      (calendar-current-date)))))
+                                  (y (+ (string-to-int y-str)
+                                        (* 100 (/ current-y 100)))))
+                             (if (> (- y current-y) 50)
+                                 (- y 100)
+                               (if (> (- current-y y) 50)
+                                   (+ y 100)
+                                 y)))
+                         (string-to-int y-str)))))
+            (if dd-name
+                (mark-calendar-days-named
+                 (cdr (assoc-ignore-case (substring dd-name 0 3)
+                                         (calendar-make-alist
+                                          calendar-day-name-array
+                                          0
+                                          '(lambda (x) (substring x 0 3))))))
+              (if mm-name
+                  (if (string-equal mm-name "*")
+                      (setq mm 0)
+                    (setq mm
+                          (cdr (assoc-ignore-case
+                                mm-name
+                                (calendar-make-alist
+                                  bahai-calendar-month-name-array))))))
+              (mark-bahai-calendar-date-pattern mm dd yy)))))
+      (setq d (cdr d)))))
+
+(defun mark-bahai-calendar-date-pattern (month day year)
+  "Mark dates in calendar window that conform to Baha'i date MONTH/DAY/YEAR.
+A value of 0 in any position is a wildcard."
+  (save-excursion
+    (set-buffer calendar-buffer)
+    (if (and (/= 0 month) (/= 0 day))
+        (if (/= 0 year)
+            ;; Fully specified Baha'i date.
+            (let ((date (calendar-gregorian-from-absolute
+                         (calendar-absolute-from-bahai
+                          (list month day year)))))
+              (if (calendar-date-is-visible-p date)
+                  (mark-visible-calendar-date date)))
+          ;; Month and day in any year--this taken from the holiday stuff.
+          (let* ((bahai-date (calendar-bahai-from-absolute
+                                (calendar-absolute-from-gregorian
+                                 (list displayed-month 15 displayed-year))))
+                 (m (extract-calendar-month bahai-date))
+                 (y (extract-calendar-year bahai-date))
+                 (date))
+            (if (< m 1)
+                nil;;   Baha'i calendar doesn't apply.
+              (increment-calendar-month m y (- 10 month))
+              (if (> m 7);;  Baha'i date might be visible
+                  (let ((date (calendar-gregorian-from-absolute
+                               (calendar-absolute-from-bahai
+                                (list month day y)))))
+                    (if (calendar-date-is-visible-p date)
+                        (mark-visible-calendar-date date)))))))
+      ;; Not one of the simple cases--check all visible dates for match.
+      ;; Actually, the following code takes care of ALL of the cases, but
+      ;; it's much too slow to be used for the simple (common) cases.
+      (let ((m displayed-month)
+            (y displayed-year)
+            (first-date)
+            (last-date))
+        (increment-calendar-month m y -1)
+        (setq first-date
+              (calendar-absolute-from-gregorian
+               (list m 1 y)))
+        (increment-calendar-month m y 2)
+        (setq last-date
+              (calendar-absolute-from-gregorian
+               (list m (calendar-last-day-of-month m y) y)))
+        (calendar-for-loop date from first-date to last-date do
+          (let* ((b-date (calendar-bahai-from-absolute date))
+                 (i-month (extract-calendar-month b-date))
+                 (i-day (extract-calendar-day b-date))
+                 (i-year (extract-calendar-year b-date)))
+            (and (or (zerop month)
+                     (= month i-month))
+                 (or (zerop day)
+                     (= day i-day))
+                 (or (zerop year)
+                     (= year i-year))
+                 (mark-visible-calendar-date
+                  (calendar-gregorian-from-absolute date)))))))))
+
+(defun insert-bahai-diary-entry (arg)
+  "Insert a diary entry.
+For the Baha'i date corresponding to the date indicated by point.
+Prefix arg will make the entry nonmarking."
+  (interactive "P")
+  (let* ((calendar-month-name-array bahai-calendar-month-name-array))
+    (make-diary-entry
+     (concat
+      bahai-diary-entry-symbol
+      (calendar-date-string 
+       (calendar-bahai-from-absolute
+        (calendar-absolute-from-gregorian
+         (calendar-cursor-to-date t)))
+       nil t))
+     arg)))
+
+(defun insert-monthly-bahai-diary-entry (arg)
+  "Insert a monthly diary entry.
+For the day of the Baha'i month corresponding to the date indicated by point.
+Prefix arg will make the entry nonmarking."
+  (interactive "P")
+  (let* ((calendar-date-display-form
+          (if european-calendar-style '(day " * ") '("* " day )))
+         (calendar-month-name-array bahai-calendar-month-name-array))
+    (make-diary-entry
+     (concat
+      bahai-diary-entry-symbol
+      (calendar-date-string 
+       (calendar-bahai-from-absolute
+        (calendar-absolute-from-gregorian
+         (calendar-cursor-to-date t)))))
+     arg)))
+
+(defun insert-yearly-bahai-diary-entry (arg)
+  "Insert an annual diary entry.
+For the day of the Baha'i year corresponding to the date indicated by point.
+Prefix arg will make the entry nonmarking."
+  (interactive "P")
+  (let* ((calendar-date-display-form
+          (if european-calendar-style
+              '(day " " monthname)
+            '(monthname " " day)))
+         (calendar-month-name-array bahai-calendar-month-name-array))
+    (make-diary-entry
+     (concat
+      bahai-diary-entry-symbol
+      (calendar-date-string 
+       (calendar-bahai-from-absolute
+        (calendar-absolute-from-gregorian
+         (calendar-cursor-to-date t)))))
+     arg)))
+
+(provide 'cal-bahai)
+
+;;; cal-bahai.el ends here
diff --git a/lisp/calendar/cal-menu.el b/lisp/calendar/cal-menu.el
index 7c7056db7e7..51cdb157ad5 100644
--- a/lisp/calendar/cal-menu.el
+++ b/lisp/calendar/cal-menu.el
@@ -63,6 +63,8 @@
   '("Insert Hebrew" . calendar-mouse-insert-hebrew-diary-entry))
 (define-key calendar-mode-map [menu-bar diary isl]
   '("Insert Islamic" . calendar-mouse-insert-islamic-diary-entry))
+(define-key calendar-mode-map [menu-bar diary baha]
+  '("Insert Baha'i" . calendar-mouse-insert-bahai-diary-entry))
 (define-key calendar-mode-map [menu-bar diary cyc]
   '("Insert Cyclic" . insert-cyclic-diary-entry))
 (define-key calendar-mode-map [menu-bar diary blk]
@@ -107,6 +109,8 @@
 (define-key calendar-mode-map [menu-bar goto islamic]
   '("Islamic Date" . calendar-goto-islamic-date))
 (define-key calendar-mode-map [menu-bar goto persian]
+  '("Baha'i Date" . calendar-goto-bahai-date))
+(define-key calendar-mode-map [menu-bar goto persian]
   '("Persian Date" . calendar-goto-persian-date))
 (define-key calendar-mode-map [menu-bar goto hebrew]
   '("Hebrew Date" . calendar-goto-hebrew-date))
@@ -266,6 +270,19 @@ ERROR is t, otherwise just returns nil."
                       '("Yearly" . insert-yearly-islamic-diary-entry))))))
     (and islamic-selection (call-interactively islamic-selection))))
 
+(defun calendar-mouse-insert-bahai-diary-entry (event)
+  "Pop up menu to insert an Baha'i-date diary entry."
+  (interactive "e")
+  (let ((bahai-selection
+         (x-popup-menu
+          event
+          (list "Baha'i insert menu"
+                (list (calendar-bahai-date-string (calendar-cursor-to-date))
+                      '("One time" . insert-bahai-diary-entry)
+                      '("Monthly" . insert-monthly-bahai-diary-entry)
+                      '("Yearly" . insert-yearly-bahai-diary-entry))))))
+    (and bahai-selection (call-interactively bahai-selection))))
+
 (defun calendar-mouse-sunrise/sunset ()
   "Show sunrise/sunset times for mouse-selected date."
   (interactive)
@@ -474,7 +491,9 @@ The output is in landscape format, one month to a page."
              (list (format "Hebrew date (before sunset): %s"
                            (calendar-hebrew-date-string date)))
              (list (format "Persian date: %s"
-                           (calendar-persian-date-string date))))
+                           (calendar-persian-date-string date)))
+             (list (format "Baha'i date (before sunset): %s"
+                           (calendar-bahai-date-string date))))
             (let ((i (calendar-islamic-date-string date)))
               (if (not (string-equal i ""))
                   (list (list (format "Islamic date (before sunset): %s" i)))))
diff --git a/lisp/calendar/calendar.el b/lisp/calendar/calendar.el
index 224e9376411..253ae38001f 100644
--- a/lisp/calendar/calendar.el
+++ b/lisp/calendar/calendar.el
@@ -26,26 +26,29 @@
 
 ;;; Commentary:
 
-;; This collection of functions implements a calendar window.  It generates a
-;; calendar for the current month, together with the previous and coming
-;; months, or for any other three-month period.  The calendar can be scrolled
-;; forward and backward in the window to show months in the past or future;
-;; the cursor can move forward and backward by days, weeks, or months, making
-;; it possible, for instance, to jump to the date a specified number of days,
-;; weeks, or months from the date under the cursor.  The user can display a
-;; list of holidays and other notable days for the period shown; the notable
-;; days can be marked on the calendar, if desired.  The user can also specify
-;; that dates having corresponding diary entries (in a file that the user
-;; specifies) be marked; the diary entries for any date can be viewed in a
-;; separate window.  The diary and the notable days can be viewed
-;; independently of the calendar.  Dates can be translated from the (usual)
-;; Gregorian calendar to the day of the year/days remaining in year, to the
-;; ISO commercial calendar, to the Julian (old style) calendar, to the Hebrew
-;; calendar, to the Islamic calendar, to the French Revolutionary calendar, to
-;; the Mayan calendar, to the Chinese calendar, to the Coptic calendar, to the
-;; Ethiopic calendar, and to the astronomical (Julian) day number.  When
-;; floating point is available, times of sunrise/sunset can be displayed, as
-;; can the phases of the moon.  Appointment notification for diary entries is
+;; This collection of functions implements a calendar window.  It
+;; generates a calendar for the current month, together with the
+;; previous and coming months, or for any other three-month period.
+;; The calendar can be scrolled forward and backward in the window to
+;; show months in the past or future; the cursor can move forward and
+;; backward by days, weeks, or months, making it possible, for
+;; instance, to jump to the date a specified number of days, weeks, or
+;; months from the date under the cursor.  The user can display a list
+;; of holidays and other notable days for the period shown; the
+;; notable days can be marked on the calendar, if desired.  The user
+;; can also specify that dates having corresponding diary entries (in
+;; a file that the user specifies) be marked; the diary entries for
+;; any date can be viewed in a separate window.  The diary and the
+;; notable days can be viewed independently of the calendar.  Dates
+;; can be translated from the (usual) Gregorian calendar to the day of
+;; the year/days remaining in year, to the ISO commercial calendar, to
+;; the Julian (old style) calendar, to the Hebrew calendar, to the
+;; Islamic calendar, to the Baha'i calendar, to the French
+;; Revolutionary calendar, to the Mayan calendar, to the Chinese
+;; calendar, to the Coptic calendar, to the Ethiopic calendar, and to
+;; the astronomical (Julian) day number.  When floating point is
+;; available, times of sunrise/sunset can be displayed, as can the
+;; phases of the moon.  Appointment notification for diary entries is
 ;; available.  Calendar printing via LaTeX is available.
 
 ;; The following files are part of the calendar/diary code:
@@ -56,6 +59,7 @@
 ;;       cal-dst.el                    Daylight savings time rules
 ;;       cal-hebrew.el                 Hebrew calendar
 ;;       cal-islam.el                  Islamic calendar
+;;       cal-bahai.el                  Baha'i calendar
 ;;       cal-iso.el                    ISO calendar
 ;;       cal-julian.el                 Julian/astronomical calendars
 ;;       cal-mayan.el                  Mayan calendars
@@ -306,6 +310,16 @@ calendar."
   :group 'holidays)
 
 ;;;###autoload
+(defcustom all-bahai-calendar-holidays nil
+  "*If nil, show only major holidays from the Baha'i calendar.
+These are the days on which work and school must be suspended.
+
+If t, show all the holidays that would appear in a complete Baha'i
+calendar."
+  :type 'boolean
+  :group 'holidays)
+
+;;;###autoload
 (defcustom calendar-load-hook nil
   "*List of functions to be called after the calendar is first loaded.
 This is the place to add key bindings to `calendar-mode-map'."
@@ -446,21 +460,23 @@ Diary entries can be based on Lisp sexps.  For example, the diary entry
 
       %%(diary-block 11 1 1990 11 10 1990) Vacation
 
-causes the diary entry \"Vacation\" to appear from November 1 through November
-10, 1990.  Other functions available are `diary-float', `diary-anniversary',
-`diary-cyclic', `diary-day-of-year', `diary-iso-date', `diary-french-date',
-`diary-hebrew-date', `diary-islamic-date', `diary-mayan-date',
+causes the diary entry \"Vacation\" to appear from November 1 through
+November 10, 1990.  Other functions available are `diary-float',
+`diary-anniversary', `diary-cyclic', `diary-day-of-year',
+`diary-iso-date', `diary-french-date', `diary-hebrew-date',
+`diary-islamic-date', `diary-bahai-date', `diary-mayan-date',
 `diary-chinese-date', `diary-coptic-date', `diary-ethiopic-date',
 `diary-persian-date', `diary-yahrzeit', `diary-sunrise-sunset',
-`diary-phases-of-moon', `diary-parasha', `diary-omer', `diary-rosh-hodesh',
-and `diary-sabbath-candles'.  See the documentation for the function
-`list-sexp-diary-entries' for more details.
+`diary-phases-of-moon', `diary-parasha', `diary-omer',
+`diary-rosh-hodesh', and `diary-sabbath-candles'.  See the
+documentation for the function `list-sexp-diary-entries' for more
+details.
 
-Diary entries based on the Hebrew and/or the Islamic calendar are also
-possible, but because these are somewhat slow, they are ignored
-unless you set the `nongregorian-diary-listing-hook' and the
-`nongregorian-diary-marking-hook' appropriately.  See the documentation
-for these functions for details.
+Diary entries based on the Hebrew, the Islamic and/or the Baha'i
+calendar are also possible, but because these are somewhat slow, they
+are ignored unless you set the `nongregorian-diary-listing-hook' and
+the `nongregorian-diary-marking-hook' appropriately.  See the
+documentation for these functions for details.
 
 Diary files can contain directives to include the contents of other files; for
 details, see the documentation for the variable `list-diary-entries-hook'."
@@ -486,6 +502,12 @@ details, see the documentation for the variable `list-diary-entries-hook'."
   :group 'diary)
 
 ;;;###autoload
+(defcustom bahai-diary-entry-symbol "B"
+  "*Symbol indicating a diary entry according to the Baha'i calendar."
+  :type 'string
+  :group 'diary)
+
+;;;###autoload
 (defcustom diary-include-string "#include"
   "*The string indicating inclusion of another file of diary entries.
 See the documentation for the function `include-other-diary-files'."
@@ -502,8 +524,9 @@ See the documentation for the function `list-sexp-diary-entries'."
 ;;;###autoload
 (defcustom abbreviated-calendar-year t
   "*Interpret a two-digit year DD in a diary entry as either 19DD or 20DD.
-For the Gregorian calendar; similarly for the Hebrew and Islamic calendars.
-If this variable is nil, years must be written in full."
+For the Gregorian calendar; similarly for the Hebrew, Islamic and
+Baha'i calendars.  If this variable is nil, years must be written in
+full."
   :type 'boolean
   :group 'diary)
 
@@ -735,11 +758,15 @@ diary buffer, set the variable `diary-list-include-blanks' to t."
 ;;;###autoload
 (defcustom nongregorian-diary-listing-hook nil
   "*List of functions called for listing diary file and included files.
-As the files are processed for diary entries, these functions are used to cull
-relevant entries.  You can use either or both of `list-hebrew-diary-entries'
-and `list-islamic-diary-entries'.  The documentation for these functions
+As the files are processed for diary entries, these functions are used
+to cull relevant entries.  You can use either or both of
+`list-hebrew-diary-entries', `list-islamic-diary-entries' and
+`list-bahai-diary-entries'.  The documentation for these functions
 describes the style of such diary entries."
   :type 'hook
+  :options '(list-hebrew-diary-entries
+	     list-islamic-diary-entries
+	     list-bahai-diary-entries)
   :group 'diary)
 
 ;;;###autoload
@@ -762,11 +789,15 @@ function `include-other-diary-files' as part of `list-diary-entries-hook'."
 ;;;###autoload
 (defcustom nongregorian-diary-marking-hook nil
   "*List of functions called for marking diary file and included files.
-As the files are processed for diary entries, these functions are used to cull
-relevant entries.  You can use either or both of `mark-hebrew-diary-entries'
-and `mark-islamic-diary-entries'.  The documentation for these functions
+As the files are processed for diary entries, these functions are used
+to cull relevant entries.  You can use either or both of
+`mark-hebrew-diary-entries', `mark-islamic-diary-entries' and
+`mark-bahai-diary-entries'.  The documentation for these functions
 describes the style of such diary entries."
   :type 'hook
+  :options '(mark-hebrew-diary-entries
+	     mark-islamic-diary-entries
+	     mark-bahai-diary-entries)
   :group 'diary)
 
 ;;;###autoload
@@ -1004,6 +1035,48 @@ See the documentation for `calendar-holidays' for details."
   :group 'holidays)
 
 ;;;###autoload
+(put 'bahai-holidays 'risky-local-variable t)
+;;;###autoload
+(defcustom bahai-holidays
+  '((holiday-fixed
+     3 21
+     (format "Baha'i New Year (Naw-Ruz) %d" (- displayed-year (1- 1844))))
+    (holiday-fixed  4 21 "First Day of Ridvan")
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 22 "Second Day of Ridvan"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 23 "Third Day of Ridvan"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 24 "Fourth Day of Ridvan"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 25 "Fifth Day of Ridvan"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 26 "Sixth Day of Ridvan"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 27 "Seventh Day of Ridvan"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 28 "Eighth Day of Ridvan"))
+    (holiday-fixed  4 29 "Ninth Day of Ridvan")
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  4 30 "Tenth Day of Ridvan"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed  5  1 "Eleventh Day of Ridvan"))
+    (holiday-fixed  5  2 "Twelfth Day of Ridvan")
+    (holiday-fixed  5 23 "Declaration of the Bab")
+    (holiday-fixed  5 29 "Ascension of Baha'u'llah")
+    (holiday-fixed  7  9 "Martyrdom of the Bab")
+    (holiday-fixed 10 20 "Birth of the Bab")
+    (holiday-fixed 11 12 "Birth of Baha'u'llah")
+    (if all-bahai-calendar-holidays
+	(holiday-fixed 11 26 "Day of the Covenant"))
+    (if all-bahai-calendar-holidays
+	(holiday-fixed 11 28 "Ascension of `Abdu'l-Baha")))
+  "*Baha'i holidays.
+See the documentation for `calendar-holidays' for details."
+  :type 'sexp
+  :group 'holidays)
+
+;;;###autoload
 (put 'solar-holidays 'risky-local-variable t)
 ;;;###autoload
 (defcustom solar-holidays
@@ -1040,15 +1113,16 @@ See the documentation for `calendar-holidays' for details."
 (defcustom calendar-holidays
   (append general-holidays local-holidays other-holidays
           christian-holidays hebrew-holidays islamic-holidays
-          oriental-holidays solar-holidays)
+          bahai-holidays oriental-holidays solar-holidays)
   "*List of notable days for the command \\[holidays].
 
-Additional holidays are easy to add to the list, just put them in the list
-`other-holidays' in your .emacs file.  Similarly, by setting any of
-`general-holidays', `local-holidays' `christian-holidays', `hebrew-holidays',
-`islamic-holidays', `oriental-holidays', or `solar-holidays' to nil in your
-.emacs file, you can eliminate unwanted categories of holidays.  The intention
-is that (in the US) `local-holidays' be set in site-init.el and
+Additional holidays are easy to add to the list, just put them in the
+list `other-holidays' in your .emacs file.  Similarly, by setting any
+of `general-holidays', `local-holidays' `christian-holidays',
+`hebrew-holidays', `islamic-holidays', `bahai-holidays',
+`oriental-holidays', or `solar-holidays' to nil in your .emacs file,
+you can eliminate unwanted categories of holidays.  The intention is
+that (in the US) `local-holidays' be set in site-init.el and
 `other-holidays' be set by the user.
 
 Entries on the list are expressions that return (possibly empty) lists of
@@ -1064,6 +1138,7 @@ Several basic functions are provided for this purpose:
                                DAYNAME after/before MONTH DAY.
     (holiday-hebrew MONTH DAY STRING)  a fixed date on the Hebrew calendar
     (holiday-islamic MONTH DAY STRING) a fixed date on the Islamic calendar
+    (holiday-bahai MONTH DAY STRING)   a fixed date on the Baha'i calendar
     (holiday-julian MONTH DAY STRING)  a fixed date on the Julian calendar
     (holiday-sexp SEXP STRING) SEXP is a Gregorian-date-valued expression
                                in the variable `year'; if it evaluates to
@@ -1091,6 +1166,11 @@ add the Islamic feast celebrating Mohammed's birthday use
      (holiday-islamic 3 12 \"Mohammed's Birthday\")
 
 since the Islamic months are numbered from 1 starting with Muharram.  To
+add an entry for the Baha'i festival of Ridvan, use
+
+     (holiday-bahai 2 13 \"Festival of Ridvan\")
+
+since the Baha'i months are numbered from 1 starting with Baha.  To
 add Thomas Jefferson's birthday, April 2, 1743 (Julian), use
 
      (holiday-julian 4 2 \"Jefferson's Birthday\")
@@ -1570,6 +1650,14 @@ Driven by the variable `calendar-date-display-form'.")
   "String of Islamic date of Gregorian date."
   t)
 
+(autoload 'calendar-print-bahai-date "cal-bahai"
+  "Show the Baha'i date equivalents of date."
+  t)
+
+(autoload 'calendar-bahai-date-string "cal-bahai"
+  "String of Baha'i date of Gregorian date."
+  t)
+
 (autoload 'calendar-goto-hebrew-date "cal-hebrew"
   "Move cursor to Hebrew date date."
   t)
@@ -1693,6 +1781,21 @@ to the date indicated by point."
 to the date indicated by point."
   t)
 
+(autoload 'insert-bahai-diary-entry "cal-bahai"
+  "Insert a diary entry for the Baha'i date corresponding to the date
+indicated by point."
+  t)
+
+(autoload 'insert-monthly-bahai-diary-entry "cal-bahai"
+  "Insert a monthly diary entry for the day of the Baha'i month corresponding
+to the date indicated by point."
+  t)
+
+(autoload 'insert-yearly-bahai-diary-entry "cal-bahai"
+  "Insert an annual diary entry for the day of the Baha'i year corresponding
+to the date indicated by point."
+  t)
+
 (autoload 'list-calendar-holidays "holidays"
   "Create a buffer containing the holidays for the current calendar window.
 The holidays are those in the list `calendar-notable-days'.  Returns t if any
@@ -1940,6 +2043,7 @@ the inserted text.  Value is always t."
   (define-key calendar-mode-map "ga"  'calendar-goto-astro-day-number)
   (define-key calendar-mode-map "gh"  'calendar-goto-hebrew-date)
   (define-key calendar-mode-map "gi"  'calendar-goto-islamic-date)
+  (define-key calendar-mode-map "gb"  'calendar-goto-bahai-date)
   (define-key calendar-mode-map "gC"  'calendar-goto-chinese-date)
   (define-key calendar-mode-map "gk"  'calendar-goto-coptic-date)
   (define-key calendar-mode-map "ge"  'calendar-goto-ethiopic-date)
@@ -1980,6 +2084,7 @@ the inserted text.  Value is always t."
   (define-key calendar-mode-map "pa"  'calendar-print-astro-day-number)
   (define-key calendar-mode-map "ph"  'calendar-print-hebrew-date)
   (define-key calendar-mode-map "pi"  'calendar-print-islamic-date)
+  (define-key calendar-mode-map "pb"  'calendar-print-bahai-date)
   (define-key calendar-mode-map "pf"  'calendar-print-french-date)
   (define-key calendar-mode-map "pm"  'calendar-print-mayan-date)
   (define-key calendar-mode-map "po"  'calendar-print-other-dates)
@@ -1996,6 +2101,9 @@ the inserted text.  Value is always t."
   (define-key calendar-mode-map "iid" 'insert-islamic-diary-entry)
   (define-key calendar-mode-map "iim" 'insert-monthly-islamic-diary-entry)
   (define-key calendar-mode-map "iiy" 'insert-yearly-islamic-diary-entry)
+  (define-key calendar-mode-map "iBd" 'insert-bahai-diary-entry)
+  (define-key calendar-mode-map "iBm" 'insert-monthly-bahai-diary-entry)
+  (define-key calendar-mode-map "iBy" 'insert-yearly-bahai-diary-entry)
   (define-key calendar-mode-map "?"   'calendar-goto-info-node)
   (define-key calendar-mode-map "tm" 'cal-tex-cursor-month)
   (define-key calendar-mode-map "tM" 'cal-tex-cursor-month-landscape)
@@ -2614,6 +2722,9 @@ Defaults to today's date if DATE is not given."
                         (let ((i (calendar-islamic-date-string date)))
                           (if (not (string-equal i ""))
                               (format "Islamic date (before sunset): %s" i)))
+			(let ((b (calendar-bahai-date-string date)))
+			  (if (not (string-equal b ""))
+			      (format "Baha'i date (before sunset): %s" b)))
                         (format "Chinese date: %s"
                                 (calendar-chinese-date-string date))
                         (let ((c (calendar-coptic-date-string date)))
diff --git a/lisp/calendar/diary-lib.el b/lisp/calendar/diary-lib.el
index c03b92a73d1..084b2881747 100644
--- a/lisp/calendar/diary-lib.el
+++ b/lisp/calendar/diary-lib.el
@@ -136,6 +136,22 @@ The holidays are those in the list `calendar-holidays'."
    "Mark dates in calendar window that conform to Islamic date MONTH/DAY/YEAR."
   t)
 
+(autoload 'diary-bahai-date "cal-bahai"
+  "Baha'i calendar equivalent of date diary entry."
+  t)
+
+(autoload 'list-bahai-diary-entries "cal-bahai"
+  "Add any Baha'i date entries from the diary file to `diary-entries-list'."
+  t)
+
+(autoload 'mark-bahai-diary-entries "cal-bahai"
+  "Mark days in the calendar window that have Baha'i date diary entries."
+  t)
+
+(autoload 'mark-bahai-calendar-date-pattern "cal-bahai"
+   "Mark dates in calendar window that conform to Baha'i date MONTH/DAY/YEAR."
+  t)
+
 (autoload 'diary-hebrew-date "cal-hebrew"
   "Hebrew calendar equivalent of date diary entry."
   t)
diff --git a/lisp/calendar/holidays.el b/lisp/calendar/holidays.el
index f8b3d0cd9d6..f535305635c 100644
--- a/lisp/calendar/holidays.el
+++ b/lisp/calendar/holidays.el
@@ -81,6 +81,10 @@
   "Holiday on MONTH, DAY (Islamic) called STRING."
   t)
 
+(autoload 'holiday-bahai "cal-bahai"
+  "Holiday on MONTH, DAY (Baha'i) called STRING."
+  t)
+
 (autoload 'holiday-chinese-new-year "cal-china"
   "Date of Chinese New Year."
   t)
@@ -137,6 +141,7 @@ The optional LABEL is used to label the buffer created."
             (if christian-holidays (cons "Christian" christian-holidays))
             (if hebrew-holidays (cons "Hebrew" hebrew-holidays))
             (if islamic-holidays (cons "Islamic" islamic-holidays))
+            (if bahai-holidays (cons "Baha'i" bahai-holidays))
             (if oriental-holidays (cons "Oriental" oriental-holidays))
             (if solar-holidays (cons "Solar" solar-holidays))
             (cons "Ask" nil)))