Confused about timezones

[Skip Montanaro]

This isn't really a Python issue, though my problem solution will be
implemented in Python. If I have a naive datetime object for some time
in the past, it's not clear to me how the offset gets set correctly.
Consider this sequence:
datetime.timedelta(-1, 64800)

Why is the UTC offset the same for both datetime objects despite the
presence/absence of Daylight Savings?

Thx,

Skip