Tz Database

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.

Its most recognizable feature is the uniform naming convention designed by Paul Eggert for time zones, such as "America/New_York" and "Europe/Paris" (see List of tz database time zones). 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 even records leap seconds.