world clock

A world clock is a clock which displays the time for various cities around the world. • Illustration — The Weltzeituhr (World Clock) at Alexanderplatz in Berlin 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. The World Clock in Alexanderplatz displays 146 cities in all 24 time zones on its head. • It could also be a picture map of the world with embedded analogue 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.

Also recorded as international clock