[WIP] Improvements to local and naive datetimes

[ariebovenberg]

Description

Checklist

• [ ] Build runs successfully
• [ ] Docs updated

Release checklist (maintainers only)

• [ ] Version updated in pyproject.toml
• [ ] Version updated in changelog
• [ ] Branch merged
• [ ] Tag created and pushed
• [ ] Published
• [ ] Github release created

[ariebovenberg]

This experiment was a dead end, see next PR