Hello! > 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 "2012-02-30" issue? Anyway, maybe we could just keep a record of this issue and move this discussion to the next phase. Regards! SaaĊĦha,