hi 🙂
<?php
$past_time = mktime(0, 0, 0, 10, 25, 1984); // using mktime f() to convert the any time to timestamp
// see php manual for mktime definition and arguments.
$curr_time = time(); // get current time in timestamp format
$result = ($curr_time-$past_time)/(60*60*24*364); // calculate the difference between those two times in timestamp format
// and the result are the second elapsed from wanted date to current date.
echo $result; // display the result
?>
i hope this will help you.