Boy, I actually have no idea. But I'll tell you it was probably today. I've made it a habit to say Please and Thank you. To say excuse me, to be polite. It gets you much further than the rudeness we all encounter every day and you know you also make friends easier.

Also, when someone asks you how you are and you say good, ask them how they are and you'll get more than an awkward pause and parting. *wink*