in waynesburg, pa, the town where i was born and in which i lived until i was 12, they have a unique holiday. each july 29th they celebrate what is called 'rain day,' because it is said to rain on that day in waynesburg almost every year (110 of the last 134 years). basically, it is an excuse to shut down the town for a day and have a big celebration, complete with carnival rides, games, food, and entertainment (kind of silly to do all of this on a day that its supposed to rain, i know. that's how they roll in the keystone state, baby).
each year they bet someone a hat that it will rain in waynesburg on july 29th. they've had bets with many local celebrities, such as troy polamalu, myron cope, mr. rogers, franco harris and mario lemieux, as well as bigger names like will ferrell and jay leno, among others.
a quick look at the weather.com shows that they will be getting rain again today. so, congrats waynesburg. have a happy rain day!