The Clock widget displays the time and date in either 24 or 12 hour format, using the local computer's clock as a reference. If the computer's clock is incorrect, so will the time displayed on the Clock widget in the local and non-local time zones.
Click + Add widget and select either Clock from the data sources list.
On the widget setup screen, choose a Title to be displayed at the top of the Clock. In the examples above, the widgets are titled with their locations.
Next select either 24 or 12 hour time format.
Finally, define the Location of the clock and its Timezone.
Click Add widget to finish.