The Desk Clock displays the current date, time, and weather. It also shows an alarm clock indicator and the battery level.
To light up the screen again, tap anywhere on the screen.
When in screensaver mode, the Desk Clock shows the time and date only and their position changes on the screen every few minutes. To light up the screen again, tap anywhere on the screen.
Use the Clock app's World Clock tab to check the current time in several places around the globe simultaneously. You can also set your home city, add more cities to the world clock list, and manually set your time zone, date, and time.