I checked the calendar on my computer and realized that it was just Sunday.
No shit, I do this all the time. I often find myself driving out of my driveway and seeing tonnes of tourists everywhere and thinking it must be a holiday or something. At some later point I realise it's just saturday. Not surprising, as everyday is the same for me, so there's no real need to know what day it actually is.
Sometimes it's better for me to just forget the days.. .it is frustrating anyway. Well, except when I have to pay the tax lol.