This isn't true in British English, at least in my experience. We'd say "25th of March". The "of" would be omitted when writing a sentence, but you'd include it when reading aloud.
I don't think there is a status quo. There is choice between autopep8, yapf (which itself supports 4 different styles), black, and maybe some more I'm missing. With languages that have a built in formatter this isn't an issue.