A belated Happy Towel Day to everyone!
From Wikipedia (which, I remind all students, is NOT a source!):
Towel Day is celebrated every May 25 as a tribute by fans of the late author Douglas Adams. On this day, fans carry a towel with them to demonstrate their love for the books and the author. The commemoration was first held in 2001, two weeks after Adams’ death on May 11, 2001.