Where did Friday go?

So...I woke up this morning after a 'nap' on the futon in the computer room. My hubby had just wandered in and I was sleepy and confused. So I asked him when did he get home and how? His answer was from where. When I told him work, he pointed out today was Saturday. So I have to ask...where did Friday go? Obviously, I slept through most of it but I'll be damned if I remember much of anything. Ugh.