print date("l, F j, Y h:m:s a", strtotime("+8 hours"));

<?php echo date("D M d, Y G:i a"); ?>

<?php
//$today = date("F j, Y, g:i a");                 // March 10, 2001, 5:16 pm
//$today = date("m.d.y");                         // 03.10.01
//$today = date("j, n, Y");                       // 10, 3, 2001
//$today = date("Ymd");                           // 20010310
//$today = date('h-i-s, j-m-y, it is w Day');     // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
//$today = date('it is the jS day.');   // it is the 10th day.
//$today = date("D M j G:i:s T Y");               // Sat Mar 10 17:16:18 MST 2001
//$today = date('H:m:s m is month');     // 17:03:18 m is month
//$today = date("H:i:s");                         // 17:16:18

echo $today;
?>

date_default_timezone_set("Asia/Colombo");

echo date("Y-m-d H:i:s");  // or any format