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'
?>
jewishtojd
(PHP 4, PHP 5, PHP 7, PHP 8)
jewishtojd — Converts a date in the Jewish Calendar to Julian Day Count
Description
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.
Parameters
-
month -
The month as a number from
1to13, where1meansTishri,13meansElul, and6and7meanAdarin regular years, butAdar IandAdar II, respectively, in leap years. -
day -
The day as a number from
1to30. If the month has only 29 days, the first day of the following month is assumed. -
year -
The year as a number between 1 and 9999
Return Values
The julian day for the given jewish date as an integer.
See Also
- jdtojewish() - Converts a Julian day count to a Jewish calendar date
- cal_to_jd() - Converts from a supported calendar to Julian Day Count
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User Contributed Notes 2 notes
erelsgl dot NOSPAM at cs dot technion dot ac dot il ¶
18 years ago
erelsgl dot NOSPAM at cs dot technion dot ac dot il ¶
18 years ago
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"
?>
