National Beer Day is celebrated in the United States every year on April 7, marking the day that ... the ratification of the Twenty-first Amendment to the U.S. Constitution. April 6, the day prior to National Beer Day, is known as New Beer's Eve.
Army Day was first celebrated on May 1, 1928. That date was chosen in hopes of dampening Communists' celebration of Workers' Day, which also occurs on May 1. But, starting in 1929, Army Day was changed to April 6, the anniversary date of the United States' entry into World War I.
After the long Lenten holiday, Dyngus Day is a day of fun. And, perhaps a little romantic fun. It is always celebrated on the Monday after Easter. The Irish traditions and celebration on Saint Patrick's Day is well known.