Attributions
Timemazone is built on open data. We credit our sources here.
City and place data
City names, geographic coordinates and country information are based on data from GeoNames, licensed under a Creative Commons Attribution 4.0 License. We have processed and reformatted this data; the underlying facts remain GeoNames’.
Time zone data
All time zone calculations — offsets, daylight saving transitions, and historical rules — are derived from the IANA Time Zone Database via each browser or server’s built-in Intl implementation. We never hard-code UTC offsets.
Timemazone is not affiliated with or endorsed by GeoNames or IANA.