Telling everybody hanging out on the block it's time to wake up and check the clock.

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One of the biggest complaints, particularly during the NCAA tournament, has been about officials stopping games to check the game clock, then adding a few tenths of a second back.

WSJ: Officials facing dilemma with video review

About three o'clock, Joe would have to check in at home.

CNN: Excerpt: 'Joe DiMaggio: The Hero's Life'

Check out the handy world clock.

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Sure enough, four days in, our routine 530am radio signal snare check generated hysteria to rival any alarm clock.

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Y2K Test : Check your PC's real-time clock to make sure that it is year-2000 compliant.

CNN: Top 10 Y2K fixes for your PC