National Whiskey Sour Day is celebrated on August 25 in honor of this beloved cocktail. A true connoisseur knows that a whiskey sour offers a rich blend of flavors. This is the perfect day for you to enjoy this delicious drink, and your chance to try it if you haven’t before. This drink is made with whiskey and bourbon. Sugar, lemon juice, and often a dash of egg white are added to the concoction. Of course, different variations of this cocktail have also been created. You might have heard of New York Sour, in which a little bit of full-bodied red wine is added to the cocktail for an interesting burst of flavor.