Yeah, good point on 8601. But that's even more of a reason to use a pre-defined 8601-parser/printer/whatever instead of a hand-written format string. If you'r

Yeah, good point on 8601. But that's even more of a reason to use a pre-defined 8601-parser/printer/whatever instead of a hand-written format string. If you're using 8601 for an interchange format... don't. But if you're forced to emit a hard-coded format for whatever consumer can't be forced to do things sanely, this would be one of those exceptions to "most people". And it should immediately stop after that exception.