> so still I prefer to allow numeric time zones. > > What I can: > > a) disallow numeric only timezone without prefix "+" or "-" > > or > > b) add "+" prefix to time zone, when number is possitive. > > I prefer @a.
I can live with (a) too. But I wonder if we should restrict the allowed tz even further, for example to say that there must always be either 2 digits (no colon) or 4 digits, with or without a colon.