Happy Columbus Day from The Monson Law Firm! Columbus Day is a U.S. holiday that commemorates the landing of Christopher Columbus in the Americas on October 12, 1492. It was unofficially celebrated in a number of cities and states as early as the 18th century, but did not become a federal holiday until 1937. For many, the holiday is a way of both honoring Columbus’ achievements and celebrating Italian-American heritage. Click here to view pictures!