I once got blind plastered drunk. I woke in the dark and couldn’t tell if it was AM or PM. Well, when I was able enough to stumble into another room to check the time I wound up tripping over a chair and hit my already very sore head and broke a toe.
Turns out it was PM. I only had an dial type clock in my room. If only it would have had AM or PM on it I would have saved so much pain..