Underwear Day is held on August 5. This event in the first decade of the month august is annual.
Similar holidays and events
International Beer Day on August 6 (is a celebration on the first Friday of every August founded in 2007 in Santa Cruz, California by Jesse Avshalomov);
Happiness Happens Day on August 8 (International observance);
Gay Uncle's Day or Guncle's Day on August 8 (is celebrated on the second Sunday in August)