Trick:- Customize the System Tray

Changing the AM/PM text of clock with any other "NAME"

You can add your name or anything you like that consists of 8 characters or less. This will replace the AM or PM next to the system time. But you can corrupt some trial licenses of 
software that you may have downloaded.


NOTE :- Firstly take the backup of your registry by one of these Software's

1. Open RegEdit 

2. Go to HKEY_CURRENT_USER\Control Panel\International 

3. Add two new String values, "s1159" and "s2359"  .If they are already present then only change the values "AM/PM" of these keys with any other text (Maximum of 8 character text).

4. Right click the new value name and modify. Enter anything you like up to 8 characters.

If you enter two different values when modifying, you can have the system tray display the two different values in the AM and PM.