title: Override Wordpress core function _wp_mysql_week()
body: <p>I would like to override the <code>_wp_mysql_week()</code> wordpress function located in <code>wp-includes/functions.php</code> since the actual <code>_wp_mysql_week()</code> is not complying with the ISO 8601 and asking the mode 1 to the <code>WEEK()</code> MYSQL function instead of the mode 3.</p>
  
  <p>I'd like to put a filter or something in the theme functions.php but couldn't find how.</p>
  
  <p>Thx for any help</p>