Yeah, trying to standardize this seems like it would quickly turn into one of those "things people believe about time" rabbit-holes of edge cases and difference

Yeah, trying to standardize this seems like it would quickly turn into one of those "things people believe about time" rabbit-holes of edge cases and differences. Even inside a single company I get scared now when someone says "if only we had just one standard way to handle this sort of thing"... if it's rarely simple for just one company, how would it work globally?