According to Douglas Adams' Hitchhiker's Guide to the Galaxy:

"...to account for human beings' peculiar habit of continually stating and restating the very very obvious, as in "It's a nice day" or "You're very tall", one theory is that if human beings don't keep exercising their lips, their brains start working..."

Remember that next time someone comments on the time change...they could just be trying to avoid complex thought.

"Looks like someone has a case of the Mondays!"