Hello! I would like to make a new suggestion about the calendar issue. > "'gregorian' is the only value defined." This raises the question whether: -0001 (implying "astronomical" numbering) is to be considered the same as -0002^gregorian or if negative years can not and never be assigned a calender (as of today's EDTF specification). I suggest to move the whole concept of "calendar" to EDTF phase two and in today's EDTF phase one, refer to ISO_8601 and only state that the "astronomical numbering" is default. Regards! SaaĊĦha,