Outlook uses the Windows settings to adjust the time settings. To change
the Calendar in Outlook to 24 hour here are the steps:
1. Close Outlook.
2. Go to Start -> Control Panel and double click Regional and Launguage
Options.
3. On the Regional Options tab click the Customize button.
4. Now select the Time tab.
5. On the Time Format drop down box select HH:mm:ss and click OK out of all
these screens.
Now open Outlook and check the Calendar.
I hope this information is helpful.
Robert Findlay
Partner Technical Lead -- Outlook/Office Setup
Microsoft Technical Support for Platforms and Business Applications
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