Project Summary
The tz database, also called the zoneinfo database or IANA Time Zone Database, is a collaborative compilation of information about the world's time zones, primarily intended for use with computer programs and operating systems. It is sometimes called the Olson database, referring to the founding contributor, Arthur David Olson. Paul Eggert is currently its editor and maintainer.
In a Nutshell, tz database...
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has a well established, mature codebase
maintained by a small development team
with increasing Y-O-Y commits -
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took an estimated 4 years of effort (COCOMO model)
starting with its first commit in February, 1984
ending with its most recent commit 3 days ago
Quick Reference
BSD 3-clause "New" or "Revised" License
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These details are provided for information only. No information here is legal advice and should not be used as such.
Public Domain
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These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryMay 14 2026 — Jun 13 2026
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12 Month SummaryJun 13 2025 — Jun 13 2026
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