Tz database
Collaborative compilation of information about the world's time zones
Summary
The tz database is a collaborative compilation of information about the world's time zones and rules for observing daylight saving time, primarily intended for use with computer programs and operating systems. Paul Eggert has been its editor and maintainer since 2005, with the organizational backing of ICANN. The tz database is also known as tzdata, the zoneinfo database or the IANA time zone database, and occasionally as the Olson database, referring to the founding contributor, Arthur David Olson.
Originally created by Dmeranda
3/24/2006, 7:16:58 PM
Modified
4/10/2026, 12:48:43 PM
Recent revisions
fixed broken category
added [[Category:[[Category:Geocodes]]]] using [[WP:HC|HotCat]]
not the [[WP:CATMAIN]] for Category:Time zones
Reverted edit by [[Special:Contribs/27.49.19.3|27.49.19.3]] ([[User talk:27.49.19.3|talk]]) to last version by Nubzor
/* References */
Rollback edit(s) by [[Special:Contributions/27.49.19.3|27.49.19.3]] ([[User_talk:27.49.19.3|talk]]): Unexplained content removal ([[w:en:WP:UV|UV 0.1.6]])
/* General */
/* Examples */ Technically it is still true that [[Kolkata]] was (at that time) the most populous city in the zone
Add first party Python package to software systems, update PyPI links to current canonical version
/* top */ punct., [[WP:EDITORHOSTILE]]
I'm not sure that Paul Eggert quote was referring to the tzdb rather than to a history document, so just directly quote the tzdb documentation. (And, yes, that document really *does* link to [[public domain]] for the term "public-domain", which is why I did so in quote=.)
Use a statement by the tzdb maintainers, rather than an archived directory listing of an FTP site, as a reference for claims about how often releases are made.
Move 1 url. [[User:GreenC/WaybackMedic_2.5|Wayback Medic 2.5]] per [[WP:URLREQ#citeftp]]
/* Location */ clarifying
Those are tzdb time zone names, which do *NOT* include spaces, they include underscores (so that, for example, they don't need to be quoted when you use them in UN*X command lines), so the underscores really truly belong there - they're *not* an artifact of the way the Wikipedia represents spaces in article URLs. Do not remove them. (And Arthur really did put a space before the semicolon in that mail message's title.)
Clean up spacing around commas and other punctuation fixes, replaced: ; → ;
Undid revision [[Special:Diff/1273107443|1273107443]] by [[Special:Contributions/2405:9800:BAA0:2200:7092:41ED:2732:213C|2405:9800:BAA0:2200:7092:41ED:2732:213C]] ([[User talk:2405:9800:BAA0:2200:7092:41ED:2732:213C|talk]]) - rv random extra space
