Do Labs Know It's Friday?

Not that I have been having a weekend, recently, but I wonder if labs know it's Friday? You know, do they know they will get even more time with me? Or that they may get to swim in a river, go for a longer walk, hang out in the back yard?

My Friday morning routine is to take them both for a long walk. Once the leashes come out do they know it's the beginning of the weekend (you know that Friday feeling?).

I am convinced labs do have internal calendars and clocks. The sense the changes. They know they get to stay up later on Friday....

Murphy's day.