Calendar Functions
PHP Manual

cal_to_jd

Converts from a supported calendar to Julian Day Count

Description

int cal_to_jd ( int $calendar , int $month , int $day , int $year )

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

calendar

Calendar to convert from, one of CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH or CAL_FRENCH.

month

The month as a number, the valid range depends on the calendar

day

The day as a number, the valid range depends on the calendar

year

The year as a number, the valid range depends on the calendar

Return Values

A Julian Day number.

See Also

  • cal_from_jd
  • frenchtojd
  • gregoriantojd
  • jewishtojd
  • juliantojd
  • unixtojd