Message 104578 - Python tracker

> I do not think that -00:00 or +00:00 will be invalid Atom timestamp,
> but to implement parser of rfc3339 timestamp, Z handling is still
> needed. I can easily imagine people making wrong assumption that
> parsing 00:00 at the end would be enough for proper round-tripping.

I can't follow you. This issue and my patch is about creating a string in RFC 3339 format, not *parsing*.