Which of these holidays takes place in October?

Columbus Day is a national holiday in many countries of the Americas and elsewhere, and a federal holiday in the United States, which officially celebrates the anniversary of Christopher Columbus arrival in the Americas on October 12, 1492. Christopher Columbus was an Italian Genovese-born explorer who became a subject of the Hispanic Monarchy in order to lead a Spanish enterprise to cross the Atlantic Ocean in search of an alternative route to the Far East, only to land in the New World. Columbus's first voyage to the New World on the Spanish ships Santa María, Niña, and La Pinta took approximately three months.

Source: Wikipedia