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24 Hour Time in Windows Vista and 7

Attention, Soldiers! Today we’re going to learn how to tell time the right way! The military way!

This simple tip will allow you to view your Windows Vista clock in 24 hour mode, so you don’t have to worry about your a.m. and p.m. anymore!
Let’s get to it!

Click the Start button and in the Search Bar type: intl.cpl


Under the formats tab click “Customize this Format


Next, click the Time Tab at the top, and under time format use the drop-down menu to select: HH:mm:ss

Note: In Windows 7, there is no “Customize this format…” option – you can just change the time format ( Long Time) under the Formats tab.


The capital H’s tell Windows Vista to show time in the 24 hour format.

Click OK, and give me 20, soldier! If you don’t like it, there’s always the Reset button at the bottom of this same window. This will put every format option back to its default setting.