In this short post I will configure my router with the correct timezone, time and date.
router1#sh clock detail
*01:56:43.478 UTC Mon Oct 19 2009
No time source
router1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
router1(config)#clock timezone GMT 0
router1(config)#end
router1#sh clock detail
*01:59:54.390 GMT Mon Oct 19 2009
No time source
router1#clock set 14:10:00 20 MARCH 2010
router1#sh clock detail
14:10:16.183 GMT Sat Mar 20 2010
Time source is user configuration