It's the Great Pumpkin, Charlie Brown (1966)

Originally aired October 27, 1966. The Peanuts gang celebrates by trick-or-treating and attending the big Halloween party, while Linus and Sally spend the evening in the pumpkin patch waiting for the Great Pumpkin to arrive. It's the Great Pumpkin, Charlie Brown is, without a doubt, the most cherished Halloween special of all time. My family and I now watch this every year on DVD as we carve our jack-o-lantern. But when I was a child, it was a special occasion to catch the annual TV broadcast. While commercials tend to annoy me, I actually looked forward to those that often accompanied this Halloween special. I remember when airings from the mid-80s often included candy ads for Mounds and Almond Joy, Caramello, Peppermint Patties, and others.

Here is a recording from October 24, 1980, shared on YouTube by the Museum of Classic Chicago Television, that includes the spinning "CBS SPECIAL" logo, as well as the opening of the program up to the first station break, and commercials that followed:

And here is the full video of It's the Great Pumpkin, Charlie Brown (1966):