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World clock

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Title: World clock  
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World clock

The Weltzeituhr (Worldtime Clock) at Alexanderplatz in Berlin
For Jens Olsen's World Clock, which is actually an astronomical clock, see Jens Olsen's World Clock

A world clock is a clock which displays the time for various cities around the world. The display can take various forms:

  • The clock face can incorporate multiple round analogue clocks with moving hands or multiple digital clocks with numeric readouts, with each clock being labelled with the name of a major city or time zone in the world.
  • It could also be a picture map of the world with embedded analog or digital time-displays.
  • A moving circular map of the world, rotating inside a stationary 24-hour dial ring. Alternatively, the disc can be stationary and the ring moving.
  • Light projection onto a map representing daytime, used in the Geochron, a brand of a particular form of world clock.

There are also worldtime watches, both wrist watches and pocket watches. Sometime manufacturers of timekeepers erroneously apply the worldtime label to instruments that merely indicate time for two or a few time zones, but the term should be used only for timepieces that indicate time for all major time zones of the globe.

See also



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