Windows 7, 8, and Vista - Changing the System Date and Time
This document explains how to change the system date and time in Windows 7, 8, and Vista.
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Right-click on the time in the bottom right of the screen, and select Adjust Date/Time.
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Click on Change date and time...
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Use the calendar navigation arrows (the arrows pointing left and right at the top corners of the calendar graphic) to change the date; and use the up-down control (the arrows pointing up and down beneath the clock graphic on the right) to change the time.
