Dydd Gwaethaf am Blywddyn

Only a Welsh scientist would calculate the worst day of the year. (Well, maybe a Scandinavian one, but they get to ski in the dark: how bad is that?)

There are exceptions, of course. For example, January 22, 2007 is not at all bad if you live in Chicago or Indianapolis. January 22 is probably not nearly as bad as January 23 or 24 will be if you live in the White House.