Steps to reproduce:

1. Set system timezone to something other than UTC/GMT, ie. 'Australia/Sydney'.
2. Run the test.

Expected:
Test works

Actual:
Test fails with different times:
FAILED tests/test_logical_types.py::test_ancient_datetime - assert datetime.date...0, 1, 1, 0, 0) == datetime.date...12, 31, 14, 0)

The test seems to try to go around it, but From Python documentation about datetime.replace() method:

Note that tzinfo=None can be specified to create a naive datetime from an aware datetime with no conversion of date and time data.

It seems that serialization and deserialization may have an issue with timezones.