PHP JDToUnix() Function

PHP Calendar Functions

Example

Convert a date in the Gregorian calendar to a Julian day count, and then convert the Julian day count to a Unix timestamp:

<?php
$jd=gregoriantojd(9,25,2016);
echo jdtounix($jd);
?>

Run Example

Definition and Usage

The jdtounix() function converts Julian day counts to Unix timestamps.

Note:If the parameter jd If not in the Unix new era (meaning the Gregorian year must be between 1970 and 2037, or jd >= 2440588 and jd <= 2465342), the function will return false. The returned time is local time.

Tip:See also unixtojd() Converts a Unix timestamp to a Julian day count.

Syntax

jdtounix(jd);
Parameter Description
jd Required. A Julian day number between 2440588 and 2465342.

Technical Details

Return Value: Returns the Unix timestamp at the start of the specified Julian date.
PHP Version: 4+

PHP Calendar Functions