Timestamps in CET but w/o DST

It is a bit uncommon to represent datetime values in a local timezone (CET) but not abide to DST rules. I would suggest to either use UTC (which is expected and with toolchain support) or in official German local time (abiding DST rules).

Unfortunately, this would need a REST API revision, so an alternative is to at least very clearly document the behavior. Inside thy Python library code, this could easily be added by a new method, so it is a viable option here.

Start by reviewing the REST API's timestamp behavior and the Python library code that exposes datetime values. Determine whether the project will adopt UTC, German local time with DST, or explicit documentation of the existing CET behavior; done means the chosen behavior is consistently implemented or clearly documented, with the API implications addressed.

Written by the indexing model from the issue text.