World Clock

How the World Clock works

A list of clocks answers "what time is it there". It does not answer the questions that usually follow: is it a sensible time to call, is it dark, and will the gap be the same next month.

World clock with a map, not just a list

The map draws each city's time zone as a coloured band, so you can see at a glance that Mumbai sits half an hour off the usual grid and that China runs one clock across five bands' worth of land. The shaded region is real night, worked out from the sun's position for this minute, with twilight as a softer edge — useful when the clock says 6 pm but you want to know whether it is still light.

Look ahead without doing arithmetic

Drag the slider to move every clock and the map forward or back by up to twelve hours. That is the quickest way to answer "if I call at 4 pm my time, where will they be?" without converting anything by hand. For a proper hour-by-hour plan across several people, the meeting planner lays every city out on one grid.

Daylight saving is shown per city

Every card shows the next date that city's clocks change, and by how much. Northern and southern hemispheres change at opposite times of year and many places never change at all, so the gap between two cities moves up to four times a year. Your cities are kept in this browser and can be shared as a link, so a team can open the same set.

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