Confusion with datetime 'dst' function result

[snippsat]

It's the same for my when test this.
Rather than try to figure what's going on,i would use Pendulum .
It provides drop-in replacements for datetime,pytz...ect (or inherit from them if needed).
Timezone is a really strong part that's done right.

>>> import pendulum
>>> 
>>> # Now not daylight savings time
>>> dt = pendulum.datetime(2019, 11, 15, tz='Europe/Berlin')
>>> dt.is_dst()
False

>>> # Go back to when it was daylight savings time(Norway)
>>> dt = pendulum.datetime(2019, 7, 15, tz='Europe/Berlin')
>>> dt.is_dst()
True