1995-09-21 03:11:06 +00:00
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;;; cal-chinese.el --- calendar functions for the Chinese calendar.
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;; Copyright (C) 1995 Free Software Foundation, Inc.
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;; Author: Edward M. Reingold <reingold@cs.uiuc.edu>
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;; Keywords: calendar
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;; Human-Keywords: Chinese calendar, calendar, holidays, diary
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;; This collection of functions implements the features of calendar.el,
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1995-10-23 22:19:07 +00:00
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;; diary.el, and holidays.el that deal with the Chinese calendar. The rules
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;; used for the Chinese calendar are those of Baolin Liu (see L. E. Doggett's
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;; article "Calendars" in the Explanatory Supplement to the Astronomical
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;; Almanac, second edition, 1992) for the calendar as revised at the beginning
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1995-10-24 15:44:12 +00:00
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;; of the Qing dynasty in 1644. The nature of the astronomical calculations
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;; is such that precise calculations cannot be made without great expense in
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;; time, so that the calendars produced may not agree perfectly with published
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;; tables--but no two pairs of published tables agree perfectly either! Liu's
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;; rules produce a calendar for 2033 which is not accepted by all authorities.
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;; The date of Chinese New Year is correct from 1644-2051.
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1995-10-23 22:19:07 +00:00
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;; Comments, corrections, and improvements should be sent to
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1995-09-21 03:11:06 +00:00
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;; Edward M. Reingold Department of Computer Science
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;; (217) 333-6733 University of Illinois at Urbana-Champaign
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;; reingold@cs.uiuc.edu 1304 West Springfield Avenue
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;; Urbana, Illinois 61801
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;;; Code:
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(require 'lunar)
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(defvar chinese-calendar-terrestrial-branch
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["Zi" "Chou" "Yin" "Mao" "Chen" "Si" "Wu" "Wei" "Shen" "You" "Xu" "Hai"])
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(defvar chinese-calendar-celestial-stem
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["Jia" "Yi" "Bing" "Ding" "Wu" "Ji" "Geng" "Xin" "Ren" "Gui"])
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(defvar chinese-calendar-time-zone
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'(if (< year 1928)
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(+ 465 (/ 40.0 60.0))
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480)
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"*Number of minutes difference between local standard time for Chinese
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calendar and Coordinated Universal (Greenwich) Time. Default is for Beijing.
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This is an expression in `year' since it changed at 1928-01-01 00:00:00 from
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UT+7:45:40 to UT+8.")
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(defvar chinese-calendar-location-name "Beijing"
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"*Name of location used for calculation of Chinese calendar.")
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1995-10-24 15:44:12 +00:00
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(defvar chinese-calendar-daylight-time-offset 60
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1995-09-21 03:11:06 +00:00
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"*Number of minutes difference between daylight savings and standard time
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for Chinese calendar.")
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1995-09-21 03:11:06 +00:00
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(defvar chinese-calendar-standard-time-zone-name
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'(if (< year 1928)
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"PMT"
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"CST")
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"*Abbreviated name of standard time zone used for Chinese calendar.")
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(defvar chinese-calendar-daylight-time-zone-name "CDT"
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"*Abbreviated name of daylight-savings time zone used for Chinese calendar.")
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1995-10-24 15:44:12 +00:00
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(defvar chinese-calendar-daylight-savings-starts
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'(cond ((< 1986 year) (calendar-nth-named-day 1 0 4 year 10))
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((= 1986 year) '(5 4 1986))
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(t nil))
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1995-09-21 03:11:06 +00:00
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"*Sexp giving the date on which daylight savings time starts for Chinese
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1995-10-24 15:49:00 +00:00
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calendar. See documentation of `calendar-daylight-savings-starts'.")
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1995-09-21 03:11:06 +00:00
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1995-10-24 15:44:12 +00:00
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(defvar chinese-calendar-daylight-savings-ends
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'(if (<= 1986 year) (calendar-nth-named-day 1 0 9 year 11))
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1995-09-21 03:11:06 +00:00
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"*Sexp giving the date on which daylight savings time ends for Chinese
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1995-10-24 15:49:00 +00:00
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calendar. See documentation of `calendar-daylight-savings-ends'.")
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1995-09-21 03:11:06 +00:00
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(defvar chinese-calendar-daylight-savings-starts-time 0
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"*Number of minutes after midnight that daylight savings time starts for
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1995-10-24 15:49:00 +00:00
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Chinese calendar.")
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1995-09-21 03:11:06 +00:00
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(defvar chinese-calendar-daylight-savings-ends-time 0
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"*Number of minutes after midnight that daylight savings time ends for
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1995-10-24 15:49:00 +00:00
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Chinese calendar.")
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1995-09-21 03:11:06 +00:00
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(defun chinese-zodiac-sign-on-or-after (d)
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"Absolute date of first new Zodiac sign on or after absolute date d.
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The Zodiac signs begin when the sun's longitude is a multiple of 30 degrees."
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(let* ((year (extract-calendar-year
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1995-10-23 22:19:07 +00:00
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(calendar-gregorian-from-absolute d)))
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1995-09-21 03:11:06 +00:00
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(calendar-time-zone (eval chinese-calendar-time-zone))
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(calendar-daylight-time-offset
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chinese-calendar-daylight-time-offset)
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(calendar-standard-time-zone-name
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chinese-calendar-standard-time-zone-name)
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(calendar-daylight-time-zone-name
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chinese-calendar-daylight-time-zone-name)
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(calendar-calendar-daylight-savings-starts
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chinese-calendar-daylight-savings-starts)
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(calendar-daylight-savings-ends
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chinese-calendar-daylight-savings-ends)
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(calendar-daylight-savings-starts-time
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chinese-calendar-daylight-savings-starts-time)
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(calendar-daylight-savings-ends-time
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chinese-calendar-daylight-savings-ends-time))
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(floor
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(calendar-absolute-from-astro
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(solar-date-next-longitude
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(calendar-astro-from-absolute d)
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30)))))
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(defun chinese-new-moon-on-or-after (d)
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"Absolute date of first new moon on or after absolute date d."
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(let* ((year (extract-calendar-year
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(calendar-gregorian-from-absolute d)))
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(calendar-time-zone (eval chinese-calendar-time-zone))
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(calendar-daylight-time-offset
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chinese-calendar-daylight-time-offset)
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(calendar-standard-time-zone-name
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chinese-calendar-standard-time-zone-name)
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(calendar-daylight-time-zone-name
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chinese-calendar-daylight-time-zone-name)
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(calendar-calendar-daylight-savings-starts
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chinese-calendar-daylight-savings-starts)
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(calendar-daylight-savings-ends
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chinese-calendar-daylight-savings-ends)
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(calendar-daylight-savings-starts-time
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chinese-calendar-daylight-savings-starts-time)
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(calendar-daylight-savings-ends-time
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chinese-calendar-daylight-savings-ends-time))
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(floor
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(calendar-absolute-from-astro
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(lunar-new-moon-on-or-after
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(calendar-astro-from-absolute d))))))
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1995-10-23 22:19:07 +00:00
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(defvar chinese-year-cache
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'((1989 (12 . 726110) (1 . 726139) (2 . 726169) (3 . 726198) (4 . 726227)
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(5 . 726257) (6 . 726286) (7 . 726316) (8 . 726345) (9 . 726375)
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1995-10-24 15:44:12 +00:00
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(10 . 726404) (11 . 726434))
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1995-10-23 22:19:07 +00:00
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(1990 (12 . 726464) (1 . 726494) (2 . 726523) (3 . 726553) (4 . 726582)
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(5 . 726611) (5.5 . 726641) (6 . 726670) (7 . 726699) (8 . 726729)
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(9 . 726758) (10 . 726788) (11 . 726818))
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(1991 (12 . 726848) (1 . 726878) (2 . 726907) (3 . 726937) (4 . 726966)
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(5 . 726995) (6 . 727025) (7 . 727054) (8 . 727083) (9 . 727113)
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(10 . 727142) (11 . 727172))
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(1992 (12 . 727202) (1 . 727232) (2 . 727261) (3 . 727291) (4 . 727321)
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(5 . 727350) (6 . 727379) (7 . 727409) (8 . 727438) (9 . 727467)
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(10 . 727497) (11 . 727526))
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(1993 (12 . 727556) (1 . 727586) (2 . 727615) (3 . 727645) (3.5 . 727675)
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(4 . 727704) (5 . 727734) (6 . 727763) (7 . 727793) (8 . 727822)
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(9 . 727851) (10 . 727881) (11 . 727910))
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(1994 (12 . 727940) (1 . 727969) (2 . 727999) (3 . 728029) (4 . 728059)
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(5 . 728088) (6 . 728118) (7 . 728147) (8 . 728177) (9 . 728206)
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(10 . 728235) (11 . 728265))
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(1995 (12 . 728294) (1 . 728324) (2 . 728353) (3 . 728383) (4 . 728413)
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(5 . 728442) (6 . 728472) (7 . 728501) (8 . 728531) (8.5 . 728561)
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(9 . 728590) (10 . 728619) (11 . 728649))
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(1996 (12 . 728678) (1 . 728708) (2 . 728737) (3 . 728767) (4 . 728796)
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(5 . 728826) (6 . 728856) (7 . 728885) (8 . 728915) (9 . 728944)
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(10 . 728974) (11 . 729004))
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(1997 (12 . 729033) (1 . 729062) (2 . 729092) (3 . 729121) (4 . 729151)
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(5 . 729180) (6 . 729210) (7 . 729239) (8 . 729269) (9 . 729299)
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(10 . 729328) (11 . 729358))
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(1998 (12 . 729388) (1 . 729417) (2 . 729447) (3 . 729476) (4 . 729505)
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(5 . 729535) (5.5 . 729564) (6 . 729593) (7 . 729623) (8 . 729653)
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(9 . 729682) (10 . 729712) (11 . 729742))
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(1999 (12 . 729771) (1 . 729801) (2 . 729831) (3 . 729860) (4 . 729889)
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(5 . 729919) (6 . 729948) (7 . 729977) (8 . 730007) (9 . 730036)
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(10 . 730066) (11 . 730096))
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(2000 (12 . 730126) (1 . 730155) (2 . 730185) (3 . 730215) (4 . 730244)
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(5 . 730273) (6 . 730303) (7 . 730332) (8 . 730361) (9 . 730391)
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(10 . 730420) (11 . 730450)))
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"An assoc list of Chinese year structures as determined by `chinese-year'.
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Values are computed as needed, but to save time, the initial value consists
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of the precomputed years 1989-2000. The code works just as well with this
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set to nil initially (which is how the value for 1989-2000 was computed).")
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(defun chinese-year (y)
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"The structure of the Chinese year for Gregorian year Y.
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The result is a list of pairs (i . d), where month i begins on absolute date d,
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of the Chinese months from the Chinese month following the solstice in
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Gregorian year Y-1 to the Chinese month of the solstice of Gregorian year Y.
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The list is cached for further use."
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(let ((list (cdr (assoc y chinese-year-cache))))
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(if (not list)
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(progn
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(setq list (compute-chinese-year y))
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(setq chinese-year-cache
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(append chinese-year-cache (list (cons y list))))))
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list))
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1995-10-24 15:44:12 +00:00
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(defun number-chinese-months (list start)
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"Assign month numbers to the lunar months in LIST, starting with START.
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Numbers are assigned sequentially, START, START+1, ..., 11, with half
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numbers used for leap months.
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1995-10-23 22:19:07 +00:00
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If optional parameter NO-LEAP-MONTHS is true, just number the months
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sequentially, ignoring the usual leap month rule.
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1995-10-24 15:44:12 +00:00
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First month of list will never be a leap month, nor will the last."
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(if list
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(if (zerop (- 12 start (length list)))
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;; List is too short for a leap month
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(cons (cons start (car list))
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(number-chinese-months (cdr list) (1+ start)))
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1995-10-23 22:19:07 +00:00
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(cons
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;; First month
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(cons start (car list))
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;; Remaining months
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(if (and (cdr (cdr list));; at least two more months...
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(<= (car (cdr (cdr list)))
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(chinese-zodiac-sign-on-or-after (car (cdr list)))))
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;; Next month is a leap month
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(cons (cons (+ start 0.5) (car (cdr list)))
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(number-chinese-months (cdr (cdr list)) (1+ start)))
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;; Next month is not a leap month
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(number-chinese-months (cdr list) (1+ start)))))))
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(defun chinese-month-list (start end)
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"List of starting dates of Chinese months from START to END."
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(if (<= start end)
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(let ((new-moon (chinese-new-moon-on-or-after start)))
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(if (<= new-moon end)
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(append (list new-moon)
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(chinese-month-list (1+ new-moon) end))))))
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(defun compute-chinese-year (y)
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"Compute the structure of the Chinese year for Gregorian year Y.
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The result is a list of pairs (i . d), where month i begins on absolute date d,
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of the Chinese months from the Chinese month following the solstice in
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Gregorian year Y-1 to the Chinese month of the solstice of Gregorian year Y."
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(let* ((next-solstice (chinese-zodiac-sign-on-or-after
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(calendar-absolute-from-gregorian
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(list 12 15 y))))
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(list (chinese-month-list (1+ (chinese-zodiac-sign-on-or-after
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(calendar-absolute-from-gregorian
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(list 12 15 (1- y)))))
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1995-10-24 15:44:12 +00:00
|
|
|
next-solstice))
|
|
|
|
|
(next-sign (chinese-zodiac-sign-on-or-after (car list))))
|
1995-10-23 22:19:07 +00:00
|
|
|
(if (= (length list) 12)
|
|
|
|
|
;; No room for a leap month, just number them 12, 1, 2, ..., 11
|
1995-10-24 15:44:12 +00:00
|
|
|
(cons (cons 12 (car list))
|
|
|
|
|
(number-chinese-months (cdr list) 1))
|
|
|
|
|
;; Now we can assign numbers to the list for y
|
|
|
|
|
;; The first month or two are special
|
|
|
|
|
(if (or (> (car list) next-sign) (>= next-sign (car (cdr list))))
|
|
|
|
|
;; First month on list is a leap month, second is not
|
|
|
|
|
(append (list (cons 11.5 (car list))
|
|
|
|
|
(cons 12 (car (cdr list))))
|
|
|
|
|
(number-chinese-months (cdr (cdr list)) 1))
|
|
|
|
|
;; First month on list is not a leap month
|
|
|
|
|
(append (list (cons 12 (car list)))
|
|
|
|
|
(if (>= (chinese-zodiac-sign-on-or-after (car (cdr list)))
|
|
|
|
|
(car (cdr (cdr list))))
|
|
|
|
|
;; Second month on list is a leap month
|
|
|
|
|
(list (cons 12.5 (car (cdr list)))
|
|
|
|
|
(number-chinese-months (cdr (cdr list)) 1))
|
|
|
|
|
;; Second month on list is not a leap month
|
|
|
|
|
(number-chinese-months (cdr list) 1)))))))
|
1995-10-23 22:19:07 +00:00
|
|
|
|
1995-09-21 03:11:06 +00:00
|
|
|
(defun calendar-absolute-from-chinese (date)
|
|
|
|
|
"The number of days elapsed between the Gregorian date 12/31/1 BC and DATE.
|
|
|
|
|
The Gregorian date Sunday, December 31, 1 BC is imaginary."
|
|
|
|
|
(let* ((cycle (car date))
|
|
|
|
|
(year (car (cdr date)))
|
|
|
|
|
(month (car (cdr (cdr date))))
|
|
|
|
|
(day (car (cdr (cdr (cdr date)))))
|
|
|
|
|
(g-year (+ (* (1- cycle) 60);; years in prior cycles
|
1995-10-23 22:19:07 +00:00
|
|
|
(1- year) ;; prior years this cycle
|
|
|
|
|
-2636))) ;; years before absolute date 0
|
|
|
|
|
(+ (1- day);; prior days this month
|
|
|
|
|
(cdr ;; absolute date of start of this month
|
|
|
|
|
(assoc month (append (memq (assoc 1 (chinese-year g-year))
|
|
|
|
|
(chinese-year g-year))
|
|
|
|
|
(chinese-year (1+ g-year))))))))
|
1995-09-21 03:11:06 +00:00
|
|
|
|
|
|
|
|
(defun calendar-chinese-from-absolute (date)
|
|
|
|
|
"Compute Chinese date (cycle year month day) corresponding to absolute DATE.
|
|
|
|
|
The absolute date is the number of days elapsed since the (imaginary)
|
|
|
|
|
Gregorian date Sunday, December 31, 1 BC."
|
1995-10-23 22:19:07 +00:00
|
|
|
(let* ((g-year (extract-calendar-year
|
|
|
|
|
(calendar-gregorian-from-absolute date)))
|
|
|
|
|
(chinese-year (+ g-year 2695))
|
|
|
|
|
(list (append (chinese-year (1- g-year))
|
|
|
|
|
(chinese-year g-year)
|
|
|
|
|
(chinese-year (1+ g-year)))))
|
|
|
|
|
(while (<= (cdr (car (cdr list))) date)
|
|
|
|
|
(if (= 1 (car (car (cdr list))))
|
|
|
|
|
(setq chinese-year (1+ chinese-year)))
|
|
|
|
|
(setq list (cdr list)))
|
|
|
|
|
(list (/ (1- chinese-year) 60)
|
|
|
|
|
(calendar-mod chinese-year 60)
|
|
|
|
|
(car (car list))
|
|
|
|
|
(1+ (- date (cdr (car list)))))))
|
1995-09-21 03:11:06 +00:00
|
|
|
|
|
|
|
|
(defun holiday-chinese-new-year ()
|
|
|
|
|
"Date of Chinese New Year."
|
|
|
|
|
(let ((m displayed-month)
|
|
|
|
|
(y displayed-year))
|
|
|
|
|
(increment-calendar-month m y 1)
|
|
|
|
|
(if (< m 5)
|
|
|
|
|
(let ((chinese-new-year
|
|
|
|
|
(calendar-gregorian-from-absolute
|
1995-10-23 22:19:07 +00:00
|
|
|
(cdr (assoc 1 (chinese-year y))))))
|
1995-09-21 03:11:06 +00:00
|
|
|
(if (calendar-date-is-visible-p chinese-new-year)
|
|
|
|
|
(list (list chinese-new-year
|
|
|
|
|
(format "Chinese New Year (%s-%s)"
|
|
|
|
|
(aref chinese-calendar-celestial-stem
|
|
|
|
|
(% (+ y 6) 10))
|
|
|
|
|
(aref chinese-calendar-terrestrial-branch
|
|
|
|
|
(% (+ y 8) 12))))))))))
|
|
|
|
|
|
|
|
|
|
(defun calendar-chinese-date-string (&optional date)
|
|
|
|
|
"String of Chinese date of Gregorian DATE.
|
|
|
|
|
Defaults to today's date if DATE is not given."
|
|
|
|
|
(let* ((a-date (calendar-absolute-from-gregorian
|
|
|
|
|
(or date (calendar-current-date))))
|
|
|
|
|
(c-date (calendar-chinese-from-absolute a-date))
|
|
|
|
|
(cycle (car c-date))
|
|
|
|
|
(year (car (cdr c-date)))
|
|
|
|
|
(month (car (cdr (cdr c-date))))
|
|
|
|
|
(day (car (cdr (cdr (cdr c-date)))))
|
|
|
|
|
(this-month (calendar-absolute-from-chinese
|
|
|
|
|
(list cycle year month 1)))
|
|
|
|
|
(next-month (calendar-absolute-from-chinese
|
1995-10-24 15:44:12 +00:00
|
|
|
(list (if (= year 60) (1+ cycle) cycle)
|
|
|
|
|
(if (= (floor month) 12) (1+ year) year)
|
|
|
|
|
(calendar-mod (1+ (floor month)) 12)
|
|
|
|
|
1)))
|
1995-10-23 22:19:07 +00:00
|
|
|
(m-cycle (% (+ (* year 5) (floor month)) 60)))
|
1995-09-21 03:11:06 +00:00
|
|
|
(format "Cycle %s, year %s (%s-%s), %smonth %s, day %s (%s-%s)"
|
|
|
|
|
cycle
|
|
|
|
|
year
|
|
|
|
|
(aref chinese-calendar-celestial-stem (% (+ year 9) 10))
|
|
|
|
|
(aref chinese-calendar-terrestrial-branch (% (+ year 11) 12))
|
|
|
|
|
(if (not (integerp month))
|
|
|
|
|
"second "
|
|
|
|
|
(if (< 30 (- next-month this-month))
|
|
|
|
|
"first "
|
|
|
|
|
""))
|
1995-10-23 22:19:07 +00:00
|
|
|
(floor month)
|
1995-09-21 03:11:06 +00:00
|
|
|
day
|
|
|
|
|
(aref chinese-calendar-celestial-stem (% (+ a-date 4) 10))
|
|
|
|
|
(aref chinese-calendar-terrestrial-branch (% (+ a-date 2) 12)))))
|
|
|
|
|
|
|
|
|
|
(defun calendar-print-chinese-date ()
|
|
|
|
|
"Show the Chinese date equivalents of date."
|
|
|
|
|
(interactive)
|
|
|
|
|
(message "Computing Chinese date...")
|
|
|
|
|
(message "Chinese date: %s"
|
|
|
|
|
(calendar-chinese-date-string (calendar-cursor-to-date t))))
|
|
|
|
|
|
|
|
|
|
(defun calendar-goto-chinese-date (date &optional noecho)
|
|
|
|
|
"Move cursor to Chinese date DATE.
|
|
|
|
|
Echo Chinese date unless NOECHO is t."
|
|
|
|
|
(interactive
|
|
|
|
|
(let* ((c (calendar-chinese-from-absolute
|
|
|
|
|
(calendar-absolute-from-gregorian
|
|
|
|
|
(calendar-current-date))))
|
|
|
|
|
(cycle (calendar-read
|
1995-10-23 22:19:07 +00:00
|
|
|
"Chinese calendar cycle number (>44): "
|
1995-09-21 03:11:06 +00:00
|
|
|
'(lambda (x) (> x 44))
|
|
|
|
|
(int-to-string (car c))))
|
|
|
|
|
(year (calendar-read
|
1995-10-23 22:19:07 +00:00
|
|
|
"Year in Chinese cycle (1..60): "
|
1995-09-21 03:11:06 +00:00
|
|
|
'(lambda (x) (and (<= 1 x) (<= x 60)))
|
|
|
|
|
(int-to-string (car (cdr c)))))
|
1995-10-23 22:19:07 +00:00
|
|
|
(month-list (make-chinese-month-assoc-list
|
|
|
|
|
(chinese-months cycle year)))
|
|
|
|
|
(month (cdr (assoc
|
|
|
|
|
(completing-read "Chinese calendar month: "
|
|
|
|
|
month-list nil t)
|
|
|
|
|
month-list)))
|
|
|
|
|
(last (if (= month
|
|
|
|
|
(car (cdr (cdr
|
|
|
|
|
(calendar-chinese-from-absolute
|
|
|
|
|
(+ 29
|
|
|
|
|
(calendar-absolute-from-chinese
|
|
|
|
|
(list cycle year month 1))))))))
|
|
|
|
|
30
|
|
|
|
|
29))
|
|
|
|
|
(day (calendar-read
|
|
|
|
|
(format "Chinese calendar day (1-%d): " last)
|
|
|
|
|
'(lambda (x) (and (<= 1 x) (<= x last))))))
|
1995-09-21 03:11:06 +00:00
|
|
|
(list (list cycle year month day))))
|
|
|
|
|
(calendar-goto-date (calendar-gregorian-from-absolute
|
|
|
|
|
(calendar-absolute-from-chinese date)))
|
|
|
|
|
(or noecho (calendar-print-chinese-date)))
|
|
|
|
|
|
1995-10-23 22:19:07 +00:00
|
|
|
(defun chinese-months (c y)
|
|
|
|
|
"A list of the months in cycle C, year Y of the Chinese calendar."
|
|
|
|
|
(let* ((l (memq 1 (append
|
|
|
|
|
(mapcar '(lambda (x)
|
|
|
|
|
(car x))
|
|
|
|
|
(chinese-year (extract-calendar-year
|
|
|
|
|
(calendar-gregorian-from-absolute
|
|
|
|
|
(calendar-absolute-from-chinese
|
|
|
|
|
(list c y 1 1))))))
|
|
|
|
|
(mapcar '(lambda (x)
|
|
|
|
|
(if (> (car x) 11) (car x)))
|
|
|
|
|
(chinese-year (extract-calendar-year
|
|
|
|
|
(calendar-gregorian-from-absolute
|
|
|
|
|
(calendar-absolute-from-chinese
|
|
|
|
|
(list (if (= y 60) (1+ c) c)
|
|
|
|
|
(if (= y 60) 1 y)
|
|
|
|
|
1 1))))))))))
|
|
|
|
|
l))
|
|
|
|
|
|
|
|
|
|
(defun make-chinese-month-assoc-list (l)
|
|
|
|
|
"Make list of months L into an assoc list."
|
|
|
|
|
(if (and l (car l))
|
|
|
|
|
(if (and (cdr l) (car (cdr l)))
|
|
|
|
|
(if (= (car l) (floor (car (cdr l))))
|
|
|
|
|
(append
|
|
|
|
|
(list (cons (format "%s (first)" (car l)) (car l))
|
|
|
|
|
(cons (format "%s (second)" (car l)) (car (cdr l))))
|
|
|
|
|
(make-chinese-month-assoc-list (cdr (cdr l))))
|
|
|
|
|
(append
|
|
|
|
|
(list (cons (int-to-string (car l)) (car l)))
|
|
|
|
|
(make-chinese-month-assoc-list (cdr l))))
|
|
|
|
|
(list (cons (int-to-string (car l)) (car l))))))
|
|
|
|
|
|
1995-09-21 03:11:06 +00:00
|
|
|
(defun diary-chinese-date ()
|
|
|
|
|
"Chinese calendar equivalent of date diary entry."
|
|
|
|
|
(format "Chinese date: %s" (calendar-chinese-date-string date)))
|
|
|
|
|
|
|
|
|
|
(provide 'cal-chinese)
|
|
|
|
|
|
|
|
|
|
;;; cal-chinese ends here
|
