python – Is there a list of Pytz Timezones?

python – Is there a list of Pytz Timezones?

You can list all the available timezones with pytz.all_timezones:

In [40]: import pytz
In [41]: pytz.all_timezones
Out[42]: 
[Africa/Abidjan,
 Africa/Accra,
 Africa/Addis_Ababa,
 ...]

There is also pytz.common_timezones:

In [45]: len(pytz.common_timezones)
Out[45]: 403

In [46]: len(pytz.all_timezones)
Out[46]: 563

Dont create your own list – pytz has a built-in set:

import pytz
set(pytz.all_timezones_set)  
>>> {Europe/Vienna, America/New_York, America/Argentina/Salta,..}

You can then apply a timezone:

import datetime
tz = pytz.timezone(Pacific/Johnston)
ct = datetime.datetime.now(tz=tz)
>>> ct.isoformat()
2017-01-13T11:29:22.601991-05:00

Or if you already have a datetime object that is TZ aware (not naive):

# This timestamp is in UTC
my_ct = datetime.datetime.now(tz=pytz.UTC)

# Now convert it to another timezone
new_ct = my_ct.astimezone(tz)
>>> new_ct.isoformat()
2017-01-13T11:29:22.601991-05:00

python – Is there a list of Pytz Timezones?

The timezone name is the only reliable way to specify the timezone.

You can find a list of timezone names here: http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
Note that this list contains a lot of alias names, such as US/Eastern for the timezone that is properly called America/New_York.

If you programatically want to create this list from the zoneinfo database you can compile it from the zone.tab file in the zoneinfo database. I dont think pytz has an API to get them, and I also dont think it would be very useful.