cal_to_jd – Convert Supported Calendar Date to Julian Day Number
The cal_to_jd() function in PHP calculates the Julian Day count from a given date, supporting Gregorian, Julian, Jewish, and French calendars, and returns the corresponding Julian Day number based on the provided calendar, month, day, and year parameters.
The cal_to_jd() function computes the Julian Day number for a specified date, supporting the calendars CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH, and CAL_FRENCH.
int cal_to_jd(int $calendar, int $month, int $day, int $year)Parameters
calendar : The selected calendar, which must be one of CAL_GREGORIAN, CAL_JULIAN, CAL_JEWISH, or CAL_FRENCH.
month : The month as an integer, with its valid range determined by the chosen calendar.
day : The day of the month as an integer, also dependent on the selected calendar.
year : The year as an integer, interpreted according to the chosen calendar.
Return value
Returns a Julian Day number representing the given calendar date.
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