Or you could just look at the calendar! I never understood this obsession with memorization of trivia. E.g. if I ever need to know the capital of South Dakota

Or you could just look at the calendar! I never understood this obsession with memorization of trivia. E.g. if I ever need to know the capital of South Dakota (not likely), I'll look at a map or just look at Wikipedia. Why would I want to memorize that?