Comment on Watch out for the Calendar GeeksparentComments−derleth15y> "Seven."Sounds like it has precisely one setting for each day of the week January 1 can fall on, which isn't sufficient to uniquely identify each possible calendar. You need fourteen settings: Two for each day, one for normal years and one for leap years.−mjd15yIt's a one-month perpetual calendar, not a one-year perpetual calendar.
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> "Seven."
Sounds like it has precisely one setting for each day of the week January 1 can fall on, which isn't sufficient to uniquely identify each possible calendar. You need fourteen settings: Two for each day, one for normal years and one for leap years.
It's a one-month perpetual calendar, not a one-year perpetual calendar.