Ha mine is on the 14th
First step is to cut off the top by stabbing down into the pumpkin, make sure to cut at an angle so the "lid" doesn't fall in.
After the top is off, remove all the seeds and pulp, the seeds can be baked up with some salt and oil and are delicious.
After it is all cleaned out, it is your blank canvas.
You can make a stencil if you want it real fancy, or just freehand it.
After it is all carved, add a candle inside to make it glow all spooky and whatnot.
Happy birthday, and have fun with it.