How to Change Vista Clock Display from 24hr to 12hr?

Written by Davinder Singh Kainth
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Time is displayed in two formats – 24hrs and 12hrs. For example after 12:59, either 13:00 (24hrs format) or 1:00 (12hrs format) is displayed. If you are using default settings for the United States, system will have 12-hour clock settings and for other countries/regions use 24-hour clock.

Here are simple steps to change or switch between 24hr and 12hr clock settings on your Windows Vista computer:

1. Click the Start button.
2. Click Control Panel, click Clock, Language and Region. If you are using Control Panel in Classic View, double-click Regional and Language Options, and then skip the next step.
3. Click Regional and Language Options.
4. Click Customize this format.
5. On the Time tab, do one of the following:

  • Change Time format to HH:mm:ss for a 24-hour clock.
  • Change Time format to hh:mm:ss tt for a 12-hour clock.

Windows XP also use similar settings for clock display. In Control Panel, click Date, Time, Language, and Regional Options. Click Regional and Language Options > Customize > Time tab and then change the time format.

QuickTip: Microsoft Outlook shows time as 13:00PM and not 1:00PM. You don’t have to modify any settings in Outlook, instead switch system display clock format using above procedure to configure time format.

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Comments

  1. cas says
    March 22, 2012 at 9:08 pm

    Amazing that this stuff is squirreled away in such an obscure place. And I am considered a computer expert!!! Couldn’t find this without coming here. Thanks.

    Reply
  2. razeem a r says
    August 29, 2011 at 12:09 pm

    thank you so much

    Reply
  3. Rosco says
    January 28, 2011 at 8:57 pm

    Thanks!!! I prefer 24hour clock!

    Reply
  4. Pallab das says
    June 22, 2010 at 12:04 pm

    thanks a lot……….

    Reply
  5. sANTOS says
    June 21, 2010 at 2:59 am

    TY …

    Reply
  6. Big D says
    May 1, 2010 at 5:37 am

    Thx – this was driving me nutz, what a relief. No way to find out unless u come across a site like this ….

    Reply
  7. Elizabeth says
    January 12, 2010 at 5:05 am

    Thanks a lot.. I am new to Windows 7 and was not able to figure this out. this page really helped

    Reply
  8. Napsterabhi says
    December 29, 2009 at 2:45 am

    thnx……………u did g8 help to me………….

    Reply
  9. Grant Kozlak says
    December 26, 2009 at 4:05 am

    Thanks! The only thing is I want my clock in 24 hr, not 12 hr format. And I am using Windows 7, not vista. Anyways, thanks and I always come back here if I need to!

    Reply
  10. vivek says
    October 11, 2009 at 8:28 pm

    hi iam new 2 vista can u help me how 2 change background on my removeable fortable device(pen drive)

    Reply
  11. your mum says
    August 16, 2009 at 1:37 pm

    awesome really helped out thnx

    Reply
  12. Eve says
    August 7, 2009 at 7:51 pm

    Thanx greatly for this. It was bugging me.

    Reply
  13. asura says
    June 19, 2009 at 2:12 am

    thanks for d help

    Reply
  14. somn says
    June 4, 2009 at 12:17 am

    thank you! it really helped.

    Reply
  15. joey says
    February 2, 2009 at 2:55 am

    omg! thanx soooooooooooooo mutch this website is ausom thanx man

    Reply
  16. Clark says
    October 25, 2008 at 9:42 pm

    thx man!!!

    Reply
  17. nick plunkett says
    October 12, 2008 at 6:29 am

    Thanks for this, it really helped me as I am new to vista and just couldn’t figure out how to change the clock over.

    Reply
  18. Mohammed Arif says
    September 17, 2008 at 2:57 am

    This is wonderful website

    Reply

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