Method
How the world clock works
The page captures one current instant and formats it in each listed IANA time zone, so every displayed city remains synchronized.
Example
World clock example
When the date changes in Tokyo, it may still be the previous calendar day in Los Angeles.
FAQ
World clock FAQ
Are the clocks synchronized?
Yes. Every city is formatted from the same browser time instant.
Will the clock update?
It refreshes each minute while the page remains open.
Does the page detect my location?
No. It uses your browser clock and a fixed city list; no location permission is requested.