Apple Day is held on October 21. United Kingdom. This event in the third decade of the month october is annual.
International Day of the Nacho on October 21 (nachos first appeared in 1943 in Piedras Negras, a small Mexican city which is very near to the U.S. military base Fort Duncan, in Texas);
World Champagne Day on October 23 (Celebrated on the penultimate Friday of October)