Columbus DayColumbus Day
a legal holiday in the U.S. commemorating the discovery of America by Columbus (Oct. 12, 1492), observed in most states on the second Monday in October
October 12, observed in the United States in commemoration of the landing by Christopher Columbus in 1492 in America. Columbus Day is now officially observed on the second Monday in October.
- A US national holiday celebrated on the second Monday in October, for Christopher Columbus' discovery.