Detect your timezone, UTC offset, and local time instantly. See your IANA timezone name and daylight saving status.
A timezone is a region of the world that observes a uniform standard time. Timezones are typically offset from Coordinated Universal Time (UTC) by whole hours, though some regions use 30- or 45-minute offsets.
Most programming uses IANA timezone names (like America/New_York or Europe/Paris) rather than UTC offsets, because IANA names automatically handle daylight saving time (DST) transitions.
Your browser reads timezone from your OS clock settings, not from your IP or GPS. Even with a VPN active, your detected timezone reflects your real system timezone unless changed manually. IANA timezone names like Europe/Paris handle DST transitions automatically.
DST shifts clocks forward in spring and back in autumn. About 40% of countries observe DST. Arizona, most of Africa and Asia do not change their clocks. The EU has been considering abolishing DST permanently.