1. Open the Control Panel (All Items view), and click on the Region and Language icon, then close the Control Panel.
2. Under the Formats tab, select the format regional language that you want to use. (See screenshot below step 3)
3. Change the time formats to how you want them displayed, and click on the Apply button. (See screenshot below)
NOTE: This will be for how the Short time and Long time will be displayed as.
4. Click on the Additional Settings button. (See screenshot above)
NOTE: This will allow you to further customize the time format.
5. Click on the Time tab, and change the time formats to how you want them displayed. (See screenshot below)