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A Digital World Clock with sunrise and sunset times. Select your location and timezone and enjoy the animated sky background. Click the time to switch between 12/24 hour display. Click the info to flip between date, sunrise/sunset and timezone.

Now its also supports the toggle of daylight saving time (DST) for each clock (just about in time for the DST change this Sunday in Europe).
Click the little icon in the lower right corner of the clock:

indicates that DST is used (+1 hour)
indicates no DST

Put your own clock from World Clockr on your homepage. This page explains how.