hahahaha i do that all the time , especially on my off week.
I will be cruising along thinking yeah it is sunday , but then bam it hits me when the news comes on , no it is monday and i have to work at 0600 tuesday. ug.
When working and school in session I keep up with things by the minute...in the summer...the Time magazine comes every Friday afternoon, otherwise toadly lost...
That is the state I live in most of the time. I don't know what week we're on, much less what day it is. That's what happens when you don't work at a regular job.
Anyhow, the way I figure it, time is a relative thing. In a parallel universe, it is likely another year altogether.