What if there were a religion of consumerism? The main holidays would be Black Friday, and Advent/Christmas. So basically it would be about the same as plenty religions because people feast and get together on Thanksgiving and Christmas, and everyone shops on/between Thanksgiving and Christmas.
(A friend of mine said Black Friday, then Boxing Day, then Valentine's would be the 3 biggest days)
What if someone made an advertisement that was the length of a music video, and looked something like it? So it would play pretty much during the whole break and would cost a lot of money, but I bet people would be more interested in watching it.