Leap year

When the year begins on a Sunday it is a leap year, says Joe Clay in a Times preview of a programme on Radio 4. But then he adds, teasingly, that the reasons are too complicated to go into in the space he has available.

Well I could Google for the answer or I could set my thinking cap on straight & work it out – when I get a few minutes to spare to sit down with a pencil & a piece of paper, after having left it to stew in the back of my mind while I get on with matters more pressing.

The thought rumbling away there is that it may have something to do with modulo 7 – assuming, of course that the assertion is true.

Related post
The daze of Christmas