- date_default_timezone_set: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
date_default_timezone_set('Europe/Sofia');
echo date('d.m.Y H:i:s', strtotime('next monday - 7 day')) ;
echo ' ';
//echo strtotime('1 Monday ago', strtotime('08.12.2013'));