Do you know where your towel is?
Towel Day is celebrated every 25th of May, and has been since 2001. Two weeks after the death of Douglas Adams who wrote the awesome Hitchhikers Guide to the Galixy series. I highly recommend it.
On this day every year those who would like to honor the memory of Douglas Adams are encouraged to wear a towel around there necks, or carry it around, or just know where it is.
From the Hitchhikers Guilde to the Galaxy:
…if a strag (strag: non-hitchhiker) discovers that a hitchhiker has his towel with him, he will automatically assume that he is also in possession of a toothbrush, face flannel, soap, tin of biscuits, flask, compass, map, ball of string, gnat spray, wet weather gear, space suit etc., etc. Furthermore, the strag will then happily lend the hitchhiker any of these or a dozen other items that the hitchhiker might accidentally have “lost”. What the strag will think is that any man who can hitch the length and breadth of the galaxy, rough it, slum it, struggle against terrible odds, win through, and still knows where his towel is is clearly a man to be reckoned with.
(via: Towel Day.org )