You can enable it by hitting the "night" button in the header: https://i.imgur.com/mHmfPDj.png
Known issues:
- some team/event logos lack an alternate version for dark mode
- highlight color of events on the front page is too bright
- stars next to usernames are too dim
- embedded tweets are very bright (will be fixed shortly)
This is just an initial version and will be iterated upon. Feedback appreciated as always!