This entire week I've had trouble remembering what day I was currently living.
Monday: was fine, I didn't work.
Tuesday: woke up and thought it was Monday. Mondays I work 11am-8pm, rather than my normal 8am-5pm. Luckily I realized what day it was at about 7:30 and was only a few minutes late to work.
Wednesday: thought it was Thursday. Panicked a bit when I checked my bank account and my paycheck hadn't been deposited yet (happens on Thursday).
Thursday: woke up and somehow thought it was Saturday.
Friday: I actually got this day right. WOOOH!