How current local time works
A city's current local time is determined by its geographical time zone and active UTC offset. TimeInOne uses IANA time-zone rules so seasonal daylight-saving changes are applied automatically.
UTC offset
Shows how far a local clock is ahead of or behind Coordinated Universal Time.
IANA time zone
Provides the official geographical rules used to calculate local time.
Daylight saving
Seasonal clock changes are automatically applied where supported.
Live updates
Individual city pages display a live local clock that updates every second.