National Clown Day in USA
National Clown Day in USA is held on August 5. Saturday of Clown Week. This event in the first decade of the month August is annual. 
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On October 8, 1970 a joint resolution was passed in Congress(Public Law 91-443), authorizing and requesting the President of the United States to issue a proclamation making August 1-7, 1971 National Clown Week. On August 2, 1971 U.S. President Richard Nixon issued Proclamation 4071 , making August 1-7, 1971 National Clown Week.
Similar holidays and events, festivals and interesting facts
U.S. Coast Guard Day on August 4
National Bakery Worker's Day in Argentina and Chile on August 4
Judge's Day in Peru on August 4
International Beer Day on August 4 (is a celebration on the first Friday of every August founded in 2007 in Santa Cruz, California by Jesse Avshalomov);
Bridge and Chopsticks Day in Japan on August 4 (Hashi No Hi);
Clown Day in Netherlands on August 5 (In Netherlands, they call it Internationale clown dag);
Clown Day in Italy on August 5 (In Italy, they call it Internazionale pagliaccio giorni);
Clown Day in Norway on August 5 (In Norway, they call it Internasjonal klovn dag);
Underwear Day on August 5
Fresh Breath Day on August 5
Work Like a Dog Day on August 5
Wiggle Your Toes Day on August 6
International Forgiveness Day on August 6
Sisters Day on August 6 (Celebrated on the first Sunday of August)