Columbus Day
noun
a day, October 12, observed as a holiday in various states of the U.S. in honor of the discovery of the New World by Columbus and his landing in the West Indies on October 12, 1492: observed in some states as the second Monday in October.
Origin of Columbus Day
An Americanism dating back to 1890–95
British Dictionary definitions for columbus day
Columbus Day
noun
Oct 12, a legal holiday in most states of the US: the date of Columbus' landing in the West Indies (Caribbean) in 1492