cal_to_jd

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

説明

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.

戻り値

A Julian Day number.