PHP ʖ²ἯTH º󍋼/A VI. Calendar functions ½鉜 The calendar extension presents a series of functions to simplify converting between different calendar formats. The intermediary or standard it is based on is the Julian Day Count. The Julian Day Count is a count of days starting from January 1st, 4713 B.C. To convert between calendar systems, you must first convert to Julian Day Count, then to the calendar system of your choice. Julian Day Count is very different from the Julian Calendar! For more information on Julian Day Count, visit http://serendipity.magnet.ch/hermetic/cal_stud/jdn.htm. For more information on calendar systems visit http://genealogy.org/~scottlee/cal-overview.html. Excerpts from this page are included in these instructions, and are in quotes. °²װ To get these functions to work, you have to compile PHP with --enable-calendar. PHP µĠWindows °汾ґ¾­Ěփ¸À©չģ¿鵄֧³֡£ĺΞШ¼Ӕ؈κθ½¼ӵĀ©չ¿⼴¿Ɋ¹ӃբЩº¯ʽ¡£ ԋАʱŤփ ¸À©չģ¿鎴¶¨ҥȎºΉ薃ָn¡£ ׊Դ Ѝ ¸À©չģ¿鎴¶¨ҥȎºΗʔ´ Ѝ¡£ Ԥ¶¨ҥ³£ ӉӚբЩ³£ʇӉ¸À©չģ¿鶨ҥµģ¬Ҳ´˖»ӐԚ¸À©չģ¿鱻±ҫµ½ PHP ֐£¬»򕟔ڔːЊ±±»¶¯̬¼Ӕغ󣬕␩³£²œА§¡£ The following constants are available since PHP 4.3.0: Ŀ¼ cal_days_in_month -- Return the number of days in a month for a given year and calendar cal_from_jd -- Converts from Julian Day Count to a supported calendar and return extended information cal_info -- Returns information about a particular calendar cal_to_jd -- Converts from a supported calendar to Julian Day Count easter_date -- Get UNIX timestamp for midnight on Easter of a given year easter_days -- Get number of days after March 21 on which Easter falls for a given year FrenchToJD -- Converts a date from the French Republican Calendar to a Julian Day Count GregorianToJD -- Converts a Gregorian date to Julian Day Count JDDayOfWeek -- Returns the day of the week JDMonthName -- Returns a month name JDToFrench -- Converts a Julian Day Count to the French Republican Calendar JDToGregorian -- Converts Julian Day Count to Gregorian date JDToJewish -- Converts a Julian Day Count to the Jewish Calendar JDToJulian -- Converts a Julian Day Count to a Julian Calendar Date jdtounix -- Convert Julian Day to UNIX timestamp JewishToJD -- Converts a date in the Jewish Calendar to Julian Day Count JulianToJD -- Converts a Julian Calendar date to Julian Day Count unixtojd -- Convert UNIX timestamp to Julian Day º󍋼/A ưµ㼯A bzwrite ɏһ¼¶ cal_days_in_month