Very interseting. That is not how it works here. You usually get a new plate every few years, and if the car exchanges owners you definitely do. Also as I said, here the month refers to the date of birth of the owner. I am sure of this because the five cars my dad owns say June (his birth month) and the two cars my mom owns (her '72 Beetle and my Honda) say October, which is her birth month. Plus my grandma's Taurus say March, her birth month. And my other grandma's Crown Victoria says May, which is her birth month. That is enough proof for me.
Intersting how they don't do it that way in California.
I wonder how some of the other states do it?