Replace Am and Pm with u'r own name..
In windows XP, you can change Am and Pm with u'r name etc.
as shown in fig.
Firstly go to Control Pannel
Then Regional and Language...
Then follow 3rd step and click on Custmize
Select Time Tab there
Now Change Am Symbol and PM symbol, which u want (as shown in step 5 in fig.)
Then click on Apply > Ok > Apply > Ok
now see at low right corner of u'r desktop
Enjoy!!!!
