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cal_to_jd

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

cal_to_jd — 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

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() - Converts from Julian Day Count to a supported calendar
  • frenchtojd() - Converts a date from the French Republican Calendar to a Julian Day Count
  • gregoriantojd() - Converts a Gregorian date to Julian Day Count
  • 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

© 1997–2025 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.cal-to-jd.php