How to Show or Hide Your Computer's Clockby Andrew Meer
By default, Windows 7, Windows 8 and Windows 8.1 display your computer’s clock on the right corner of your taskbar, which also shows the current date, month and year in addition to time. Seeing the clock on the taskbar may help you manage your time effectively, but it takes up space that could be used by taskbar shortcuts and system tray items. Depending on your needs, you can either enable or disable the clock by configuring the Windows notifications panel.
Configure Notifications Panel
Right-click a vacant area on the taskbar and then select the option labeled “Properties.” Under the Taskbar tab, click the “Customize” button. On the following window, click the option labeled “Turn System Icons On or Off.” Use the pull-down menu next to clock and select either “On” to turn on the clock or “Off” to turn off the clock. Click “OK” to save the changes.
Adjust Clock Time
To adjust the time of your clock, left-click the clock once and then click "Change Date and Time Settings" on the pop-up box. Under the Date and Time tab, use the Change Date and Time and Change Time Zone buttons to manually change your time and time zone. To automatically update your clock using a time server instead, click the "Internet Time" tab, click "Change Settings," check the box next to "Synchronize" and click "Update Now."