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evansiroky/timezone-boundary-builder

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A tool to extract data from Open Street Map (OSM) to build the boundaries of the world's timezones.

10 mentions on Hacker News by 8 people: 0 stories, 10 comments · first 2019-02-28 · latest 2025-09-07

Mentions per year 10 mentions · busiest year 2024 (4)
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  1. …updated). It would be wonderful if Jiff supported coordinates-to-tz lookups out of the box :) [0]: https://github.com/evansiroky/timezone-boundary-builder/rele... [1]: https://github.com/evansiroky/timezone-boundary-builder#look... [2]:…
    comment by akio · 2025-09-07 · in RFC 3339 vs. ISO 8601
  2. …it. If you don't like it, don't use it. If there are clear bugs, I'm always open to feedback. [0] https://github.com/evansiroky/timezone-boundary-builder
    comment by ChrisMarshallNY · 2025-05-20 · in Show HN: A Simple Server to Match Long/Lat to a TimeZone
  3. …local time, but got bogged down getting the exact timezone boundaries. Thanks for bringing up https://github.com/evansiroky/timezone-boundary-builder !
    comment by cyberax · 2025-05-20 · in Show HN: A Simple Server to Match Long/Lat to a TimeZone
  4. …Which sources its data from here, which seems like a pretty high quality source: https://github.com/evansiroky/timezone-boundary-builder/rele...
    comment by collinmanderson · 2024-11-01 · in Australia/Lord_Howe is the weirdest timezone
  5. …from the TZ Boundary Builder project[1]. [0] https://github.com/LittleGreenViper/LGV_TZ_Lookup [1] https://github.com/evansiroky/timezone-boundary-builder
    comment by ChrisMarshallNY · 2024-10-30 · in Australia/Lord_Howe is the weirdest timezone
  6. …In the meantime, use the 2023b release. [0] https://github.com/LittleGreenViper/LGV_TZ_Lookup [1] https://github.com/evansiroky/timezone-boundary-builder
    comment by ChrisMarshallNY · 2024-02-13 · in Falsehoods programmers believe about time zones (2020)
  7. …tell you what timezone a latitude/longitude point is in, using data derived from OpenStreetMap via https://github.com/evansiroky/timezone-boundary-builder Here's a demo: https://timezones.datasette.io/timezones/by_point?longitude=... - add…
    comment by simonw · 2024-01-28 · in SpatiaLite: Library extending SQLite to support Spatial SQL capabilities
  8. …to deploy this tool, but here's a program for generating a TZ shapefile from OpenStreetMap data: https://github.com/evansiroky/timezone-boundary-builder In principle a calendar program could use its output to perform GIS lookups of…
    comment by NateEag · 2022-08-23 · in Falsehoods programmers believe about time
  9. https://github.com/evansiroky/timezone-boundary-builder
    comment by xellisx · 2019-03-28 · in Storing UTC is not a silver bullet
  10. One part of the puzzle are projects like this, giving you location to timezone: https://github.com/evansiroky/timezone-boundary-builder Mapping city to location is a classic geocoding task, for which there's APIs and tools around.
    comment by detaro · 2019-02-28 · in Ask HN: Is there a free list of cities mapped to their tz database time zones?