November 6 is Hot Scotch and Lemon Day.
Why November 6? Because hot scotch and lemon is a cool-weather drink, and November 6 is exactly halfway through autumn. It's the midpoint (give or take half a day) between the end of summer and the beginning of winter.
Today is the first day of autumn, so we begin the countdown to Hot Scotch and Lemon Day in the traditional way: "Say, it's the first day of autumn. Hot Scotch and Lemon Day is coming up."
(It's not, when you get down to it, a day that requires a great deal of preparation. A bottle of scotch, a lemon, and you're pretty well set. The point of the countdown is to avoid saying, "Wait, wasn't yesterday Hot Scotch and Lemon Day?")