What is the "weekend"?
So I had an instance yesterday during a conversation where what is understood to be the "weekend" was not the same between me and the person to which I was talking. I was talking to my neighbor and we were discussing the nice weather yesterday and I said that it wouldn't be lasting long because it was going to turn bad again over the weekend. She replied " I don't know if that's right. I think we are going to have one more day of nice weather." Of course I was referring specifically to Saturday and Sunday, but the weekend for her obviously included Friday. It was just funny because it is exactly what we discussed in class. I didn't go on to clarify because I didn't really see it as necessary but immediately recognized the misunderstanding.

Comments
This example is so common. Ealier in the week, Monday or Tuesday, one of my roommates invited me to go camping next weekend. I thought he was talking about the 28th-30th, but no, he was talking about today through Easter Sunday.