Towel Day Post author:HFM Post published:May 24, 2006 Post category:Odd Holidays In honor of Douglas Adams — carry a towel all day long on May 25th. You Might Also Like Odd Holiday Alert: National Straw Hat Day – May 15th May 11, 2004 Happy Birthday, Apple January 19, 2006 World Jump Day – July 20, 2006 May 9, 2005