My old college pal Chet Farmer, of Miscellaneous Heathen, points out that leap year does not technically happen every four years. Here’s how to identify a leap year: * The year is divisible by 4, and it’s not a century year * The year is divisible by 4, and it’s a century year also divisible by 400. In other words, 1900, while divisible by 4, is not divisible by 400, and so was not a leap year — nor will 2100 be one, either. However, 2000 was. What’s sort of funny about this is that, to a first approximation,...


