Is There a List of pytz Timezones?

The Problem

Python applications often need to work with timezones for date-time conversion and timezone calculations, staying accurate to the timezone of a particular location.

But if you want to make use of a specific timezone, or access a list of popular timezones, how do you list available timezones in Python?

The Solution

Using zoneinfo (recommended, Python 3.9+)

Since Python 3.9, the zoneinfo module is part of the standard library, so no extra dependency is needed. Use zoneinfo.available_timezones() to get a set of all available IANA timezone names:

from zoneinfo import available_timezones

print(sorted(available_timezones()))

Output (shortened):

['Africa/Abidjan', 'Africa/Accra', 'Africa/Addis_Ababa', 'Africa/Algiers', ... 'US/Samoa', 'UTC', 'W-SU', 'WET', 'Zulu']

Because available_timezones() returns a set, you can filter it the same way. For example, to list European timezones:

from zoneinfo import available_timezones

europe_timezones = sorted(tz for tz in available_timezones() if tz.startswith("Europe/"))
print(europe_timezones)

Output (shortened):

['Europe/Amsterdam', 'Europe/Andorra', 'Europe/Astrakhan', 'Europe/Athens', ... 'Europe/Warsaw', 'Europe/Zagreb', 'Europe/Zaporozhye', 'Europe/Zurich']

Using pytz (for projects that already use pytz)

If your project already depends on pytz, you can list timezones with the all_timezones attribute:

import pytz

print(pytz.all_timezones)

This attribute returns a list of all the time zones supported by the pytz module.

Output (shortened):

['Africa/Abidjan', 'Africa/Accra', 'Africa/Addis_Ababa', 'Africa/Algiers', ... 'US/Samoa', 'UTC', 'Universal', 'W-SU', 'WET', 'Zulu']

You can also filter for specific regions, for example European timezones:

import pytz

europe_timezones = [timezone for timezone in pytz.all_timezones if "Europe" in timezone]
print(europe_timezones)

Output (shortened):

['Europe/Amsterdam', 'Europe/Andorra', 'Europe/Astrakhan', 'Europe/Athens', ... 'Europe/Warsaw', 'Europe/Zagreb', 'Europe/Zaporozhye', 'Europe/Zurich']

pytz also provides the common_timezones_set attribute that returns commonly used timezones as a set:

import pytz

common_timezones = pytz.common_timezones_set
print(common_timezones)

Output (shortened):

LazySet({'America/Indiana/Vevay', 'US/Arizona', 'Asia/Yerevan', ... 'Asia/Chita', 'Pacific/Saipan', 'Africa/Nouakchott'})