May 1 has been "loyalty day" in the US for quite some time.
And I bet you can guess why.
International Workers' Day, also known as Labour Day in some countries is a celebration of labourers and the working classes that is promoted by the international labour movement, socialists, communists or anarchists and occurs every year on May Day (1 May), an ancient European spring festival.
May Day is one of the most important holidays in communist countries such as the People's Republic of China, North Korea, Cuba and the former Soviet Union.
The holiday was first observed in 1921, during the First Red Scare. It was originally called "Americanization Day," and it was intended to replace the May 1 ("May Day") celebration of the International Workers' Day, which commemorates the 1886 Haymarket Massacre in Chicago.
During the Second Red Scare, it was recognized by the U.S. Congress on April 27, 1955, and made an official reoccurring holiday on July 18, 1958 (Public Law 85-529). President Dwight D. Eisenhower proclaimed May 1, 1955, the first observance of Loyalty Day.In 1958, Eisenhower urged Congress to move Child Health Day to the First Monday in October, to avoid conflicting with Loyalty Day Loyalty Day has been recognized with an official proclamation every year by every president since its inception as a legal holiday in 1958.