[roarcher]

The calendar proposed by the article has the same problem, see the part about the yearend period and leap years. Yes, the issue occurs less often, but the question "what date is one month from today" still doesn't have a simple answer. Do we want 36 days from today? Today's date next month? What if today is the 2nd of Decilis, are we talking about the 2nd day of yearend or the 2nd day of Primilis?

These questions are a pain in the ass with the Gregorian calendar and they would be a pain in the ass with this one, and basically any conceivable calendar. No calendar can change the fact that there isn't an integer number of days in a year, and that the closest integer (365) doesn't have nice factors for making a calendar out of.