tzid stringlengths 7 30 | geometry unknown |
|---|---|
Africa/Abidjan | "AQMAAAABAAAATWsAAFcFajF4aBfA8uocA7K/JECg/x68dmkXwKsEi8OZvyRAcVZETfRpF8D7Wpcaob8kQCzWcJF7ahfAPITx07i(...TRUNCATED) |
Africa/Accra | "AQMAAAABAAAAdlMAAHE6yVaXU5K/nprLDYY6JkDl7nN8tDiTv3Ds2XOZOiZA0LTEymjkk7/qPZXTnjomQLa+SGjLuZS/Q1a3ek4(...TRUNCATED) |
Africa/Addis_Ababa | "AQMAAAABAAAAplgAAEM8Ei9PT0NAiC6ob5nTDEAGSgosgE9DQCC3Xz5Z0QxAEOz4LxBQQ0DayeAoedUMQLOxEvOsUENAyM9Grpv(...TRUNCATED) |
Africa/Algiers | "AQMAAAABAAAAdi8AAFSNXg1QEiRAU+dR8X8nOUDM8QpETxIkQIOmJVZGJzlARfEqa5sSJEDgLCXLSRQ5QKPogY/BEiRA4J9SJco(...TRUNCATED) |
Africa/Asmara | "AQMAAAABAAAA0h8AAHo2qz5Xk0VA/wkuVtRwKUAaTwRxHqZFQOW36GSplSlAkxraAGymRUCXi/hOzJopQA4UeCefpEVA8WJhiJy(...TRUNCATED) |
Africa/Bamako | "AQMAAAABAAAACXgAAFcFajF4aBfA8uocA7K/JEBNEkvK3WcXwC0FpP0PwCRAROBIoMFmF8AhkEscecAkQEEtBg/TXhfAu7VMhuP(...TRUNCATED) |
Africa/Bangui | "AQMAAAABAAAAeIQAAHkEN1K22CxA1zTvOEVXGECFRNrGn9gsQE890uC2VhhAfZV87C7YLEBz1qcck1UYQM0gPrDj1yxArroO1ZR(...TRUNCATED) |
Africa/Banjul | "AQMAAAABAAAA2AYAAMb4MHvZ8jDAPQrXo3AdKkBXJZF9kMEwwD0K16NwHSpAZ2Ml5lnBMMA8E5oklhwqQL7Ye/FFvzDAjSjtDb4(...TRUNCATED) |
Africa/Bissau | "AQMAAAABAAAA7BMAAJYgI6DC5TDAda4oJQR7KED8witJnrcwwJIFTODWrShAccgG0sWyMMBmguFcw7QoQN14d2SssjDAMGR1q+e(...TRUNCATED) |
Africa/Blantyre | "AQYAAAADAAAAAQMAAAABAAAAjAAAANBhvrwAS0FAhNkEGJb3J8ASwM3ixUpBQFUYWwhy+CfAo0CfyJNKQUCUEReARvknwC+JsyJ(...TRUNCATED) |
Timezone Boundary Builder 2026d as GeoParquet
The 2026d release of Timezone Boundary Builder, converted to GeoParquet. Each row is one timezone boundary feature with a tzid and polygon geometry. The release provides three boundary interpretations as separate configurations:
all-zones(timezones.parquet): one feature for each timezone identifier in the comprehensive boundary set.same-since-1970(timezones-1970.parquet): zones whose timekeeping has remained the same since 1970 are merged.same-since-now(timezones-now.parquet): zones with the same current timekeeping are merged; this is not the full list of IANA identifiers.
Snapshot and validation
- Source release: 2026d, published 2026-09-16.
- Retrieved: 2026-10-25. The fixed release archives and their SHA-256 hashes are included under
raw/2026-10-25/. - CRS: EPSG:4326; coordinates follow GeoJSON longitude, latitude order.
- Geometry column:
geometry; feature key:tzid. - Original GeoJSON ZIPs are included unchanged.
timezone-names*.jsonfiles explain the merged identifiers.
| Configuration | Features | Geometry types | Null or invalid geometries |
|---|---|---|---|
all-zones |
419 | POLYGON, MULTIPOLYGON | 0 |
same-since-1970 |
301 | POLYGON, MULTIPOLYGON | 0 |
same-since-now |
65 | POLYGON, MULTIPOLYGON | 0 |
Some borders are approximate: the upstream project combines OpenStreetMap boundaries and timezone reference data, and documents inferred borders in open water and omissions of some uninhabited islands.
Read with DuckDB
INSTALL spatial;
LOAD spatial;
SELECT tzid, geometry
FROM 'hf://datasets/yuiseki/timezone-boundary-builder-2026d/parquet/timezones.parquet';
Choose timezones.parquet, timezones-1970.parquet or timezones-now.parquet to match the question. Spatial boundaries do not provide historical UTC offsets or time conversion rules; use the IANA time-zone database for those.
License and attribution
The boundary database and this derived GeoParquet are offered under the Open Database License (ODbL) v1.0. ODbL requires retaining the license notice and share-alike terms for publicly conveyed derivative databases. The full license text is included as LICENSE.
Attribution: Contains information from Timezone Boundary Builder, which is made available under the Open Database License (ODbL). The upstream data includes OpenStreetMap contributors and IANA time-zone data. This is a derived GeoParquet conversion; the upstream MIT license applies to code, not to boundary data.
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