Back Base de dades tz Catalan Zeitzonen-Datenbank German Βάση δεδομένων ζωνών ώρας Greek Tempozona datumaro Esperanto TZ Database Spanish Aikavyöhyketietokanta Finnish Tz database French Basis Data Zona Waktu ID Tz database Japanese Basis Dhata Zona Wektu JV

Tz database

The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d of the List of tz database time zones with OpenStreetMap data, using open source software.[1]

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.[2] Paul Eggert has been its editor and maintainer since 2005,[3] with the organizational backing of ICANN.[4] The tz database is also known as tzdata, the zoneinfo database or the IANA time zone database (after the Internet Assigned Numbers Authority), and occasionally as the Olson database, referring to the founding contributor, Arthur David Olson.[5]

Its uniform naming convention for entries in the database, such as America/New_York and Europe/Paris, was designed by Paul Eggert.[6] The database attempts to record historical time zones and all civil changes since 1970, the Unix time epoch.[7] It also records leap seconds.[8]

The database, as well as some reference source code, is in the public domain.[9] New editions of the database and code are published as changes warrant, usually several times per year.[10]

  1. ^ Siroky, Evan (1 January 2024). "Time Zone Boundary Builder".
  2. ^ Eggert, Paul; Olson, Arthur David. "Time zone and daylight saving time data".
  3. ^ Eggert, Paul (17 January 2005). "Re: FW: IANA time zone registration – proposal". tz (Mailing list).
  4. ^ Cite error: The named reference :0 was invoked but never defined (see the help page).
  5. ^ Olson, Arthur David (16 December 1986). "Resolved timezone issue? Other issues. New ctime manual page". tz (Mailing list).
  6. ^ Eggert, Paul (20 October 1993). "proposal for time zone names". tz (Mailing list).
  7. ^ Olson, Arthur David (18 March 1987). "Re: List of issues". tz (Mailing list).
  8. ^ Devine, Bob (2 June 1988). "leap seconds; [0-60] is ok". tz (Mailing list).
  9. ^ Eggert, Paul (11 November 1995). "questions and comments on http://tycho.usno.navy.mil/tzones.html". tz (Mailing list).
  10. ^ "zoneinfo tzcode and tzdata archives (FTP)". Retrieved 30 October 2007.

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