Towel Day is an annual celebration on the 25th of May, as a tribute to the late author Douglas Adams (1952-2001). On that day, fans around the universe proudly carry a towel in his honour.
DON’T PANIC: When Douglas Adams, the author of “The Hitchhiker’s Guide to the Galaxy,” died of a heart attack 11 years ago this month, a group of fans organized an impromptu “Towel Day” celebration in his memory. Why Towel Day? Because a towel, as readers of Adams’s delirious novel will remember, “is about the most massively useful thing an interstellar hitchhiker can have.” from Inside the List by Gregory Cowles
I expect to be using a towel when I go to the beach tomorrow for the long Memorial Day week-end. A record high is expected.