National Harvey Wallbanger Day is celebrated on November 8th every year.
The day celebrates the alcoholic drink made with vodka, Galliano liqueur, and orange juice.
The drink used to be quite popular in the 1970s, however, it can still be readily found on bar menus. It is quite easy to make at home too and you can always experiment with the type of liqueur or switch up the variety of orange.
The day is celebrated by mixologists and everyone who enjoys a good drink. Harvey Wallbangers have also been referenced in various TV shows and films.