Windows 7 doesn't show AM/PM symbols in system tray clock. Also it shows the time in 24 hour format i.e. 18:03

If you want to get back the AM / PM symbols, then this tutorial will help you.
1. Type intl.cpl in RUN or start menu search box and press Enter. It'll open Regional and Language Options window.
2. Now click on "Addition Settings" button.
3. Go to "Time" tab and you'll see the value of "Long time" will be set to HH:mm:ss. Just add tt at last of the value, i.e. change the value to HH:mm:ss tt
4. If you want to show the time in 12 hour format (06:30 instead of 18:30), then change the value to hh:mm:ss tt

5. That's it. Click on Apply button and you'll get the AM / PM symbols back in system tray clock.

PS: If you want to customize AM / PM symbols to something else, then follow this tutorial:
How to Customize AM and PM Symbols in System Tray in Windows?
NOTE: If you want to hide Time in system tray, put a blank space in "Long time" text box under "Time" tab.
This article was posted by VG in following section: Troubleshooting, Windows 7.
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Amirul Ashraff
Thanks for the tips. I have been wondering on how to do this :) Thanks :)
Maximo
Please, tell me how can I do to make "seconds" appear in the 24 hours form. Thanks. Regards
Sue
Thank you! Finally, an explanation that I can follow!
Maximo
It is me again. Is there any explanation for seconds absent from 12/24 hours format? I can choose format HH:mm:ss (17:25:??) but seconds never appear. How 3rd party apps show seconds? and can change size, font, colour, etc.?. I could never get any info about this tip. Can you help me? Thanks a lot. Regards.
VG
^^ Thats a limitaion. Windows doesnt show seconds for some unknown reason. The font is shown by the Windows theme so you'll need to modify the theme to change the font.
galu
thanks....it worked for me!
sathish
thnx really it was useful to me..
shyam
its great, actually i was searching for this
mazhar khoso
thank you friend thank you verry much
1 time more thanks
Patel Parth M
Thanks ...it is Grate and so amazing !!!!!!!!!!!