Time Zone Database
The Time Zone Database (often called tz or zoneinfo) contains code and data that represent the history of local time for many representative locations around the globe. It is updated periodically to reflect changes made by political bodies to time zone boundaries, UTC offsets, and daylight-saving rules. Its management procedure is documented in BCP 175: Procedures for Maintaining the Time Zone Database.
2023b (Released 2023-03-23)
|tzdb-2023b.tar.lz (513.5kb)||Complete Distribution (Data, Code and Extras)|
|tzdata2023b.tar.gz (432.6kb)||Data Only Distribution|
|tzcode2023b.tar.gz (285.6kb)||Code Only Distribution|
Announcements: A low-volume announcement mailing list used for announcing updates
to the Time Zone Database.
Submissions and Discussion: A higher volume discussion list used for discussing
proposals for updates to the Database. Contributions to this list may be
emailed to email@example.com.
We provide access to the Time Zone Database via three methods:
- HTTP: https://www.iana.org/time-zones
- FTP: ftp://ftp.iana.org/tz/
- Rsync: rsync://rsync.iana.org/tz/
The IESG-designated TZ Coordinators are Paul Eggert (primary) and Tim Parenti (secondary).
Further information on the Time Zone Database, including implementation details, is described in the code repository.