Play-Doh Day
Play-Doh Day is held on September 16. This event in the second decade of the month September is annual. 
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Originally available in white only in 1956, Play-Doh soon expanded to include basic colors red, blue and yellow. It is now sold in a panoply of hues, including Rose Red, Purple Paradise, Garden Green and Blue Lagoon. In fact, it was marketed and sold solely for another purpose: wallpaper cleaner!
More than 700 million pounds of Play-Doh have been created. More than 100 million cans are sold annually. Play-Doh was inducted into the Toy Hall of Fame in 1998. This National Play-Doh Day, peel open a container or two of your favorite colors and let your imagination run wild.
Similar holidays and events, festivals and interesting facts
International Dot Day on September 15
Confucius Day on September 15 (Confucius' birthday falls on the 27th day of the eighth lunar month according to the Chinese calendar);
Felt Hat Day on September 15
Mayflower Day on September 16
Collect Rocks Day on September 16
Batman Day on September 17 (an annual observance begun by DC Comics on September 17, 2013. The purpose of Batman Day is to celebrate the anniversary of the character’s first ever appearance, which was in Detective Comics #27 way back in May 1939);
World Gratitude Day on September 21 (First celebrated in 1965);
International Eat An Apple Day on September 21 (Third Saturday of Septembe);
Miniature Golf Day on September 21
International Day of Struggle against Monoculture Tree Plantations on September 21