No Pants Day
No Pants Day is held on May 7. It is held on the first Friday in May. This event in the first decade of the month May is annual. 
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A small campus club at University of Texas at Austin known as the Knighthood of Buh thought that dropping trousers on the first Friday of May was a humorous stunt for the end of the semester. Informal for years, promotion efforts began in 2000. The event attracted attention in other states and several parts of Canada as well as France, Sweden, Australia, Finland, and Britain.
Try to spend it in an original and within the bounds of decency!
Similar holidays and events, festivals and interesting facts
No Homework Day on May 6 (this is the day where children can tell their teachers and parents in complete honesty that they will not be doing their homework, in order to mark this special day);
World Password Day on May 6 (first Thursday of May);
Coloring Day on May 6
No Socks Day on May 8
Iris Day on May 8
National Animal Disaster Preparedness Day in US on May 8 (Held on the second Saturday of May);
White Lotus Day on May 8 (Theosophy)