What Is a Time Zone?

A time zone connects a region to its local clock rules. Its UTC offset can change with daylight saving time, so an offset alone is not a complete time-zone name. An IANA identifier, such as America/New_York, lets a calendar apply the rules for the date you choose.

Your device setting can differ from your physical zone. Use the location-based time-zone finder, or choose a zone below to see its current clock and next change.