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# cal_to_jd

(PHP 4 >= 4.1.0, PHP 5)

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`.

See also cal_from_jd().

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