If you like wall calendars, do you ever think of reusing them?

You probably know that there are only fourteen calendars. There’s one 365-day calendar starting on each day of the week, because January 1 can fall on any of the seven days, and one 366-day calendar for each, because a leap year can also start on any day. That’s fourteen.

Of course, they don’t just rotate through, one after another, because leap years come every four, not every seven. So the calendar for 2018 is the same as the one for 2007, and that arrangement won’t occur again until 2029. The one we used in 2000 comes up again in 2028. But 2001’s recurred in 2007.

So—if you love pictorial wall calendars, as I do, you might find that if you hang onto one for a while, you can use it again.

So do you?

Tags as I wrote them: calendars, years, leap years, cycles of time.