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PHP | juliantojd() Function

PHP Juliantojd() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP juliantojd() Function.

The built-in juliantojd() function converts a Julian Calendar date to Julian Day Count. Valid range for Julian Calendar is 4713 B.C. to 9999 A.D.


Following below is the syntax to use this function -

juliantojd ( $month, $day, $year );

Parameter Details

Sr.NoParameter & Description


The month as a number from 1 to 12



The day as a number from 1 to 31



The year as a number between -4713 and 9999

Return Value

This function returns the Julian Day for the given Julian date as an integer.


Try out the below example -

   $jd = juliantojd(10,3,2007);
   echo($jd . "\n");
   $julian = jdtojulian($jd);


When the above code is executed, it will produce the following result -


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP unixtojd() Function.

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