Draft for review: ISO 8601 date work on IS 29500

[MURATA Makoto (FAMILY Given)]

> On your tiny technical proposal, I am much less keen. "Z" denotes UTC, and is as much 
>a time zone as "-09:00". ISO 8601 allows times with no time zone
>whatsoever ("local times") and so Gareth and I are proposing we allow
>only those.

Since "Z" is UTC, I withdraw my proposal.  In the beginning of the
working draft, please state that we disallow both "Z" and numeric
offsets.

Cheers,
Makoto