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PHP GregorianToJD() Function

PHP Calendar Reference Complete PHP Calendar Reference

Definition and Usage

The GregorianToJD() function converts a date from the Gregorian calendar to Julian day count.

Syntax

gregoriantojd(month,day,year)

Parameter Description
month Required. Specifies the month
day Required. Specifies the day
year Required. Specifies the year. Valid range is from 4714 B.C. to 9999 A.D.

Tips and Notes

Note: Although this function can handle dates back to 4714 B.C., you should notice that the Gregorian calendar was not instituted until 1582, and some countries did not accept it until much later (Britain converted in 1752, USSR in 1918, and Greece in 1923). Most European countries used the Julian calendar prior to the Gregorian.

Example

<?php
$jd = gregoriantojd(10,3,1975);
echo($jd . "<br />");

$gregorian = jdtogregorian($jd);
echo($gregorian);
?>

The output of the code above will be:

2442689
10/3/1975

PHP Calendar Reference Complete PHP Calendar Reference
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