Check local times and compare cities at a glance.
View all →Plan by date and explore holidays and celebrations worldwide.
View all →Follow local time and traditions to discover each city’s rhythm.
View all articles →Explore real geographic time zone regions, city markers and UTC offsets at one selected instant.
Choose inputs and calculate to see your result.
The browser loads a simplified Timezone Boundary Builder 2026e dataset, derived from OpenStreetMap under ODbL 1.0. Region clocks use matching IANA 2026e transitions; city clocks reuse the shared city time engine. The same UTC instant is used throughout. Pan, zoom, region selection and city time calculations run locally without map tiles or a paid API.
Uses your device clock and pinned IANA time-zone rules. This is not a certified atomic-clock service.
Time input supports 1970–2100. Geographic polygons describe the 2026e release, even when another year is selected; they do not reconstruct historic boundary changes. Simplification, source omissions and overlapping regions make point selection approximate. Future rules may change. A named city or IANA region is preferable near a border. The map is not a legal boundary authority.
Your settings stay in this browser. You can clear them at any time.
