No Socks Day
No Socks Day is held on May 8. This event in the first decade of the month May is annual. 
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Experts believe that the first socks were worn by cavemen, who wrapped animal skins around their feet and tied them at the ankle. The word ‘sock’ comes from the Latin word ‘soccus’ – a loose-fitting slipper worn by Roman comic actors.
National No Socks Day in USA was created by Tom and Ruth Roy, who’ve come up with numerous holidays over the years that are legit enough to be included some years in Chase’s Calendar of Events, which writer Richard E. Meyer called “the nation’s annual bible of extraordinary occasions” in a Los Angeles Times story about the Roys in 1996.
No Socks Day is a chance to free your feets from socks and stockings and to give your toes a breath of fresh air. Your toes can feel the fresh air without socks and can breathe freely.
Similar holidays and events, festivals and interesting facts
World Password Day on May 7 (first Thursday of May);
Iris Day on May 8
White Lotus Day on May 8 (Theosophy);
Lost Sock Memorial Day on May 9
National Animal Disaster Preparedness Day in US on May 9 (Held on the second Saturday of May);
Fork Day in Japan on May 9
Goku Day in Japan on May 9