It's an interesting way to think about life. I recently talked to a theatre stage manager, who compared her first day on a project to the first day of school, with everyone walking in to a new space, with new "classmates" and new supplies. While she might feel first day excitement or jitters, she was inevitably surrounded by people experiencing the same, or at least, very similar, things.
In my 24/7 world, there may be overlap of experience or feeling. But there is also the difference that comes with shift work. My eagerness to start may be met with your eagerness simply to be done. My exhaustion at 8am may be met with your fresh-faced "hello" to the day.
And so, on a day-to-day basis, I am faced with the lesson that essentially faces us all every day--that our view of the world is really just OUR view, influenced by how open or closed our eyes might be any given moment or how many days are left till our next period of down time. So, I remember to calm my "Monday" bounce, just a little, when talking to co-workers for whom it is "Friday." I bear in mind that my extreme need for sleep at 8am after an overnight, or after a series of overnights, might seem odd to the 8am-ers. In work, and in life, you just never know when your Friday is someone else's Monday.