How the Tz Database Works
Posted4 months agoActive4 months ago
yatsushi.comTechstory
calmpositive
Debate
20/100
Time ZonesDate and Time CalculationsOpen-Source Databases
Key topics
Time Zones
Date and Time Calculations
Open-Source Databases
The post explains how the Tz database works, and the discussion highlights its complexities and intricacies, as well as related resources and projects.
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Sep 11, 2025 at 7:06 AM EDT
4 months ago
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Discussion (3 comments)
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gabrielsroka
4 months ago
https://news.ycombinator.com/item?id=45162559
oliverkwebb
4 months ago
Related, I have written about the formatting of the TZ database and other representations before: https://gitlab.com/libtime/documentation/-/wikis/Timezones
zoezoezoezoe
4 months ago
The Tz database is fascinating, the amount of random data you'll find in there for the sole purpose of calculating time and date is bizarre. The Tz database has an estimate of the Big Bang, there are several time zones that have hundreds of hard coded daylight saving transitions, or manually calculating when ramadan happens and placing that data in tzdb files.
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ID: 45210144Type: storyLast synced: 11/17/2025, 6:13:35 PM
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