test_date

<?php

$tomorrow  = mktime(0, 0, 0, date("m")  , date("d")+1, date("Y"));

$lastmonth = mktime(0, 0, 0, date("m")-1, date("d"),   date("Y"));

$nextyear  = mktime(0, 0, 0, date("m"),   date("d"),   date("Y")+1);

?>