PHP Calendar function

PHP 5 Calendar function

function	Description
Cal_days_in_month ()	Returns the number of days in the one month for the specified year and calendar.
CAL_FROM_JD ()	Converts the Julian day count to the date of the specified calendar.
Cal_info ()	Returns information about the specified calendar.
CAL_TO_JD ()	Converts the date of the specified calendar to a Julian day count.
Easter_date ()	Returns the Unix timestamp for the Easter midnight of the specified year.
Easter_days ()	Returns the number of days between Easter and March 21 for the specified year.
FRENCHTOJD ()	Convert the date of the French Republican calendar into a Julian day count.
GREGORIANTOJD ()	Convert the date of the Gregorian calendar into a Julian day count.
Jddayofweek ()	Returns the day of the week.
Jdmonthname ()	Returns the name of the month.
Jdtofrench ()	Convert the Julian day count to the date of the French Republican calendar.
Jdtogregorian ()	Convert the Julian day count to the date of the Gregorian calendar.
Jdtojewish ()	Convert the Julian day count to the date of the Jewish calendar.
Jdtojulian ()	Convert the Julian day count to the date of the Julian calendar.
Jdtounix ()	Converts the Julian day count to a Unix timestamp.
JEWISHTOJD ()	Convert the date of the Jewish calendar to a Julian day count.
JULIANTOJD ()	Convert the date of the Julian calendar to the Julian day count.
UNIXTOJD ()	Converts a Unix timestamp to a Julian day count.

PHP 5 pre-defined Calendar constants

Constants	type	PHP version
Cal_gregorian	Integer	PHP 4
Cal_julian	Integer	PHP 4
Cal_jewish	Integer	PHP 4
Cal_french	Integer	PHP 4
Cal_num_cals	Integer	PHP 4
Cal_dow_dayno	Integer	PHP 4
Cal_dow_short	Integer	PHP 4
Cal_dow_long	Integer	PHP 4
Cal_month_gregorian_short	Integer	PHP 4
Cal_month_gregorian_long	Integer	PHP 4
Cal_month_julian_short	Integer	PHP 4
Cal_month_julian_long	Integer	PHP 4
Cal_month_jewish	Integer	PHP 4
Cal_month_french	Integer	PHP 4
Cal_easter_default	Integer	PHP 4.3
Cal_easter_roman	Integer	PHP 4.3
Cal_easter_always_gregorian	Integer	PHP 4.3
Cal_easter_always_julian	Integer	PHP 4.3
Cal_jewish_add_alafim_geresh	Integer	PHP 5.0
Cal_jewish_add_alafim	Integer	PHP 5.0
Cal_jewish_add_gereshayim	Integer	PHP 5.0

PHP Calendar function