{"entry":{"slug":"world-time-zone-boundaries","kind":"dataset","title":"World time zone boundaries","description":"Explore 419 named IANA time zone areas on a world map. Compare time zone boundaries and add your own notes.","topic":"Time zones","region":"World","updated":"2026-09-15","preview":"/library/world-time-zone-boundaries.a4986aaf85d2.webp","assetId":"world-time-zone-boundaries","sourcePage":"https://github.com/evansiroky/timezone-boundary-builder/releases/tag/2026c","notes":["Each area has an IANA time zone identifier. The map uses the complete timezones land-boundary release.","Use the areas to compare time zone coverage and add notes to a world map.","Boundaries are simplified with a tolerance of 0.02 degrees. Small boundary details can be omitted.","The source release is 2026c, published 2026-07-11. This map was prepared on 15 September 2026.","UTC offsets depend on the date and daylight saving rules. This layer does not supply a current UTC offset.","The areas are approximate time zone boundaries. They are not legal boundary evidence.","The standard map view ends near 85 degrees north and south. The download retains all source coordinates, including polar areas."],"related":[],"preset":{"color":"#2563eb","fillOpacity":0.28,"basemap":"carto","bounds":[-180,-85.0511287798,180,83.873906]}},"asset":{"id":"world-time-zone-boundaries","version":"5c3b3169b98c","url":"/library/world-time-zone-boundaries.5c3b3169b98c.geojson","sha256":"5c3b3169b98cf106ef2629591127493f01ac21e8c4142db47c82534913f156c4","bytes":1943898,"featureCount":419,"geometryTypes":["MultiPolygon","Polygon"],"source":{"name":"Time zone boundary builder","url":"https://github.com/evansiroky/timezone-boundary-builder/releases/tag/2026c","license":"ODbL 1.0","licenseUrl":"https://github.com/evansiroky/timezone-boundary-builder/blob/master/DATA_LICENSE","attribution":"Time zone boundary builder contributors and OpenStreetMap contributors. Derived data under ODbL 1.0."},"fields":[{"name":"name","description":"IANA time zone identifier used as the area label."},{"name":"tzid","description":"IANA time zone identifier."},{"name":"source_url","description":"IANA time zone database information."}]}}