Time and time zones
The main clock and city clocks try to sync with server time, allowing for estimated communication delay. The interface identifies this estimate; if synchronization is unavailable, it indicates that it is using the device clock. This is not a guarantee of atomic-clock precision. The Unix converter uses the device clock.
The clocks use identifiers from the international IANA Time Zone Database. The browser applies the time zone's current rules, including seasonal clock changes where applicable.
We do not treat a fixed UTC offset as a substitute for a time zone. Government rules may change; for flights, reservations and critical appointments, also confirm with the responsible official source.