Adjust your PC time based on the atomic clock time value.
Place a monthly calendar on your Windows desktop.
Split the time right into MS Excel.
Keep track of the time in different parts of the world.
Place alarm clock on your desktop and wake up by alarm timed to particular days of week.
Don't forget your umbrella when it's raining.
Track time your spend on different projects and receive reminders.
Display the current time like analog clock.
Synchronize your PC's clock with the atomic timeserver in Colorado.
Add a stopwatch to your Windows desktop.