Take any 3x3 set of nine squares from a calendar and create a magic square using those nine dates. Describe a simple method for creating such a magic square. Repeat for any 4x4 square.
Source: Original.
| Ken's Puzzle Calendar | October, 2005 | PQRST Puzzle Competition | |
| November, 2005 | Internet Puzzle Solvers Test | ||
| June, 2006 | 2006 Puzzle Design Tournament | ||
| June, 2006 | US Puzzle Championship | ||
