Your internal clock is a liar and honestly it deserves a formal complaint.
You know that moment when you wake up absolutely convinced it's Saturday, full of peace and weekend energy, ready to do absolutely nothing productive, and then reality crashes in like an uninvited guest at a dinner party. It's Wednesday. It's very much Wednesday. You have places to be and your brain just betrayed you in the most spectacular fashion possible.
Scientists like to call this "dream residue" which sounds very official and important. The idea is that your sleeping brain drags bits of its little dream world into your waking one, confusing your sense of time and day like a GPS that keeps rerouting you back to somewhere you definitely did not want to go.