This is why RFC 3339 (and ISO 8601 before it) doesn't allow you to do -07 as an offset, you must specify the whole damn thing (even though so many are whole hou

This is why RFC 3339 (and ISO 8601 before it) doesn't allow you to do -07 as an offset, you must specify the whole damn thing (even though so many are whole hours). Even more amusingly, thanks to the old "noon is when the sun is at its zenith", there are historical time zones that aren't representable as whole minute offsets from UTC either.