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Tz database
The tz database, also called tzdata, the zoneinfo database or IANA (Internet Assigned Numbers Authority) 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 its editor and maintainer.
Its uniform naming convention for time zones, such as ''America/New_York'' and ''Europe/Paris'', was designed by Paul Eggert. The database attempts to record historical time zones and all civil changes since 1970, the Unix time epoch. It also includes transitions such as daylight saving time, and also records leap seconds.
The database, as well as some reference source code, is in the public domain. New editions of the database and code are published as changes warrant, usually several times per year.〔(【引用サイトリンク】 url=ftp://munnari.oz.au/pub/oldtz/ )〕
== Data structure ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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