<!DOCTYPE html> <html> <body> <?php echo(strtotime("now") . "<br>"); echo(strtotime("5 September 2016") . "<br>"); echo(strtotime("+5 hours") . "<br>"); echo(strtotime("+1 week") . "<br>"); echo(strtotime("+1 week 3 days 7 hours 5 seconds") . "<br>"); echo(strtotime("next Monday") . "<br>"); echo(strtotime("last Sunday")); ?> </body> </html>