Some of zone records use 3 or 4 letter abbreviations that are tied to physical time zones, others use numeric UTC offsets. The worlds timing centers have agreed to keep their time scales closely synchronized - or coordinated - therefore the name Coordinated Universal Time. Time zone abbreviations for both Standard Time and Daylight Saving Time are shown exactly as they appear in the database. UTC is the time standard commonly used across the world. This table does not attempt to document any of the historical data which resides in the database. The UTC offsets are based on the current or upcoming database rules. Standard Time ( STD) and Daylight Saving Time ( DST) offsets from UTC in hours and minutes.įor zones in which Daylight Saving is not observed, the DST offset shown in this table is a simple duplication of the STD offset.

Once converted, format any way you please. Hope this helps someone attempting to convert python datetime objects to UTC. Historical data for such zones is still preserved in the source code, but it is not included when compiling the database with standard options. Here, constants.TIMEZONE is where I had the default timezone of my persisted objects. The dagger symbol (†) signifies that the zone was canonical in a previous version of the database. Note that created moments have equal UTC time because these moments were created in a default timezone.

Link - An alternative name (alias) which links to a canonical zone.

Canonical - The primary, preferred zone name. Such designations can be ambiguous for example, 'CST' can mean China Standard Time (UTC+8), Cuba Standard Time (UTC5), and (North American) Central Standard Time (UTC6), and it is also a widely used variant of ACST ( Australian Central Standard Time, UTC+9:30).

This is a list of time zones from release 2023c of the tz database.

World map showing time zones from the tz database version 2017a

Utc time zone name