[Undertoad]

I had a boss who would say that every single night. We would leave the office together, and as we'd be getting into our cars, as a way of saying goodbye, he'd say "Well, tomorrow is another day. See ya."

This is one of those statements that you make that, when logically analyzed, means nothing at all. Yes, by its very definition, tomorrow, not being today, is another day. We could not say "Tomorrow is the same day. See ya."

Unless we were Bill Murray in Groundhog Day.

The only other similar phrase that comes to mind is "It is what it is," which seems to have gained popularity amongst people I come into contact with, over the last decade. "It is what it is" is even more a statement of nothing at all.

Although... maybe I've underestimated this. Maybe it's a sincere attack on nihilism, or a recognition of basic logic. A=A, Ayn Rand would remind us, and then use that as the leaping-off point for just about any other philosophical meandering.

It is what it is: hence, tomorrow is another day.