JewishToJD

Description

int jewishtojd ( int month, int day, int year )

Although this function can handle dates all the way back to the year 1 (3761 B.C.), such use may not be meaningful. The Jewish calendar has been in use for several thousand years, but in the early days there was no formula to determine the start of a month. A new month was started when the new moon was first observed.

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erelsgl dot NOSPAM at cs dot technion dot ac dot il
20-Sep-2006 05:21


JewishToJD returns 0 when the day number is 31 or more.



However, when the day number is 30, JewishToJD returns a valid Julian Day, even when the month only has 29 days. So, for example:

<?php

JDToJewish(JewishToJD(4,30,5767)) === "5/1/5767"

?>

erelsgl dot NOSPAM at cs dot technion dot ac dot il
19-Sep-2006 08:55


For non-leap years, this function returns the same for month 6 (Adar I) and month 7 (Adar II), so, for example:



<?php

JewishToJD(6,15,5766) === JewishToJD(7,15,5766)



JDToJewish(JewishToJD(7,15,5766)) === '6/15/5766'

?>

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