cal_to_jd
PHP function
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(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
Converts from a supported calendar to Julian Day Count
Description
cal_to_jd(int $calendar, int $month, int $day, int $year): int
cal_to_jd() calculates the Julian day count for a date in the specified calendar. Supported calendars are CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH and CAL_FRENCH.
Parameters
calendarCalendar to convert from, one of
CAL_GREGORIAN,CAL_JULIAN,CAL_JEWISHorCAL_FRENCH.monthThe month as a number, the valid range depends on the
calendardayThe day as a number, the valid range depends on the
calendaryearThe year as a number, the valid range depends on the
calendar
Return Values
A Julian Day number.