There's a day set aside every year to commemorate the life and works of the late literary great Douglas Adams. It's May 25th to be precise. It's tomorrow!
There's a web site, so I'm posting a link to the towelday.org FAQ.
FYI, I count The Hitchhikers Guide To The Galaxy as one of my all-time favourite novel trilogies (I have all five parts of it!), radio series, TV series, computer games, and yes, even the 2005 movie!
Yes, I do know where my towel is, it's completely awesome. And yes, I will be carrying it around with me all day.