The Register today (29th Feb 2008), has highlighted an all too common issue for several thousand people. Their birthdays fall on the leap day of a leap year. To emphasise their plight they have written a snippet of perl code to show how easy it is to get the number of days in a year. Obviously it might be a little more robust if they use something like DateTime, but the general rule is there. They have now taken on Toys R Us and Microsoft to fix the problem in their websites and software respectively. I wish them luck :)