Trick to Show Your name after time in taskbar..

Step-1:-

goto - 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.

Did It change? If not, follow step-2 below.

Step2:- Now go to time in taskbar and Double Click it to open "Date and time property" ...Look place where time changes in digital form i.e. 02:47:52 AM , click to arrow to cnage the AM or PM by selecting and press arrow. It will Show ur name.