When is now?

It is bad when you really have no idea what day of the week it is.  My trusty Mac tells me it is Saturday evening now, and I believe it.  But the fact that it is indeed Saturday took me by surprise.  The fact is I had no idea what day it really was.  Lately, I have just had my head down, nose to the grindstone.  I look in the little notebook where I have my work schedule written down – what date, what hours on that date – and it doesn't mention the day of the week, it doesn't need to.  But it is a good thing I found out that tomorrow is Sunday, the bus schedule is different on Sundays.  Time for bed.