Mental Floss

Brain Game: The Monthlies

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It may take you days to solve today's Brain Game. In fact, I guarantee that it will, because it's about calendars. Suppose you're a craftsman that likes to print calendars using wooden blocks. You've designed a grid exactly like this one:

calendar
calendar /

How many different blocks would you have to carve to fit inside the above grid to handle ALL possible months?

Here is the SOLUTION.

SOLUTION:

FORTY in all. The calendar would require:

  • 31 blocks for the numbers 1 through 31
  • 2 "split date" blocks reading "23/30" and "24/31" (for 31-day months beginning on Friday, or 30- or 31-day months beginning on Saturday, see sample below)
  • 7 "blank" blocks (all would be used in a non-leap-year February)
August 2009 sample
August 2009 sample /

 

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