Yep, I do this more than I should. When I am scheduled for shifts at work, I keep my calendar out and check my phone every few hours to make sure I know what day it is, sometimes.

I have had migraine disease for years and it messes with my head.

Last Wednesday, I labored under the impression that it was Thursday all day (needless to say, I didn't have any shifts scheduled) until my youngest kid came home and had to show me that we weren't doing what I thought was going on Thursday night.