Birthing class?

Sierra
We are trying to decide when to take our labor and birthing class. They fill up so quick I am needing to sign up soon. I am due December 5, there is 1 class in October and 1 class in November. I would love to take the class as late as possible so I have everything in my mind trying to remember anyways. But I am afraid if I deliver early I won't have the class in, so am thinking October. My fiance thinks November is when we should take it. Opinions?