> The date 2012-02-30 using the (very short lived) Swedish calendar is still a valid date
Well, 1712-02-30 is "valid" in this calendar, but not in the (gregorian)
astronomical one and thus nothing for today's EDTF without conversion.
AFAIK, no plans were ever made at all to consider 2012-02-30 as a valid
date within the Swedish calendar. Have you some references about the
Anyway, maybe we could just keep a record of this issue and move this
discussion to the next phase.