In this article, you will learn how to use the PHP juliantojd() function to convert a Julian Date to a Julian Day Count.

What is the syntax of the juliantojd() function in PHP?

juliantojd(jd);

Parameters	Details
month	Specify the month number(1-12) – Required
day	Specify the month number(1-31) – Required
year	Specify the year number (-4713-9999)- Required

Examples of the juliantojd() function

Example 1. In the following example, we simply convert a Julian Date to Julian Day Count and then convert the Julian Day Count back to Julian Date.

<?php
$j_d=juliantojd(1998);
echo $j_d;
echo jdtojulian($j_d);
?>