World clock

A World Clock is a clock that displays the time of several or all time zones of the world. During World clocks existed in the past decades mainly of larger installations, have existed for a few years more and more digital models, some of which also fit on a desk or even on your wrist and take into account the possible change of date with.

The simple at first glance division into 24 time zones is complicated by locally different light saving time and half hour steps in the Asian region.