Right your name in place of AM/PM (at the Right-Bottom Side of your monitor screen)

Navigate to -> Start -> Control Pannel -> Regional and Language Option -> Click on Customize -> Go to TIME Tab -> Change AM symbol and PM symbol from AM and PM to ur name -> Apply -> Ok ...

Source & Read more: http://www.mastipk.net/beginner-level/410-put-your-name-place-date-am-pm.html#ixzz1UbUeTrVb