Thursday, May 25th is the day to celebrate the life of one of science fiction’s most imaginative and irreverent contributors: Douglas Adams. If you’re not familiar with his Hitchhiker’s Guide to the Galaxy series, then your peril sensitive sunglasses need serious adjustment.

Read about the origins and evolution of this momentous occasion at the Wikipedia’s Towel Day entry, but the upshot is simple: Don’t forget your towel.

Photo: Towel Day by Elke Vogelsang