International Towel Day

Here it is, 2008, seven years after Douglas Adams' passing, and I'm only now finding out about International Towel Day. From the Wikipedia.org article:

Towel Day is celebrated every May 25 as a tribute by fans of the late author Douglas Adams. The commemoration was first held in 2001, two weeks after his death on May 11, 2001. On this day, fans carry a towel with them during the day to demonstrate their participation and mourning of the author. The towel is a reference to Adams's popular science fiction comedy series The Hitchhiker's Guide to the Galaxy.

The official Towel Day website is here.