International Workers' Day/Labor Day - May 1^st, or May Day, became an international day of celebration of the worker and of labor movements, particularly in socialist and communist countries. In the U.S., Labor Day is celebrated on the first Monday in September.

Law Day - According to the Library of Congress website, "[i]n the late 1950s, the American Bar Association instituted May 1 as Law Day to draw attention to both the principles and practice of law and justice. President Dwight D. Eisenhower established Law Day by proclamation in 1958."

Loyalty Day - First observed in 1921 to counter communist May Day observances in the U.S. and around the world, Loyalty Day was established as a day for Americans to celebrate our freedoms and reaffirm our allegiance to our nation. Loyalty Day became a legal U.S. holiday by Act of Congress in 1958.