World Clock
View the current date and time for several cities alongside their IANA zone names. The clock supports quick international comparisons but does not synchronize the device with an internet time server.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Loading the tool. If it does not appear, reload this page.
How to use this tool
Check the city and zone labels and refresh if needed. The instant comes from the device clock, while regional formatting and daylight-saving behaviour depend on the browser’s Intl timezone data.
Results and examples
Seoul and Tokyo show the same local time at a given instant. New York and Sydney follow different seasonal transitions, so their differences from other cities can change during the year.
Limitations
- An incorrect device clock shifts the reference instant for every displayed city.
- Recent civil-time changes and background refresh timing depend on browser data and state.
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
Why do Seoul and Tokyo show the same time?
Seoul and Tokyo show the same local time at a given instant. New York and Sydney follow different seasonal transitions, so their differences from other cities can change during the year.
Is the device synchronized to standard time?
An incorrect device clock shifts the reference instant for every displayed city. Recent civil-time changes and background refresh timing depend on browser data and state.
