Ice Cream Soda Day is observed on June 20, 2018. An ice cream soda is a beverage that consists of ice cream in either a soft drink or in a mixture of flavored syrup and carbonated water. Variations of the ice cream soda are as countless as the varieties of soda and the flavors of ice cream, but some have become more prominent than others.
The ice cream soda was invented by Robert McCay Green in Philadelphia, PA, in 1874 during the sesquicentennial celebration. The traditional story is that, on a particularly hot day, Mr. Green ran out of cream for the flavored sodas he was selling and used vanilla ice cream from a neighbor and invented a new drink. (With material from: Wikipedia)