World clock
Uses your browser's timezone database — always DST-correct.
What is World clock?
Coordinating across timezones means constantly translating "3pm my time" into what that actually is for someone in Tokyo or London — a live multi-city clock removes the mental math.
How to use it
Add any city/timezone from the dropdown; each clock updates every second using your browser's timezone database, so daylight saving transitions are always handled correctly.
Example
9:00 AM in New York is simultaneously 2:00 PM in London and 11:00 PM in Tokyo.