Description:
------------
---
From manual page: http://www.php.net/function.strftime#Examples
---

A location aware replacement for Example #3:

<?php
$format = '%%e%%%e%%'; // Jan 1: results in: '%e%1%' (%%, e, %%, %e, %%)

if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
    $format = preg_replace('#(?<!%)((?:%%)*)%e#', '\1%#d', $format);
}