There are only 14 different possible calendars (7 possible days of the week for January 1st, times 2 for leap year or not). This isn't anything special.

I guess people like to think the Americans are going to land on the moon again, or something.

Born in 1953, so been there, done that.

... and the 1997 one.

The calendar repeats every 28 years (give or take the hiccough about leap years and years divisible by 100 but not 400)

And unless Easter is important enough for you that you count it as part of the calendar.

Seriously… Easter was the main motivation for the Gregorian calendar’s creation.