You are very lucky December because we celebrate you all month long.
There are a couple well-meaning holidays during December.
People get together for parties during your month. At work they are able to spend some time together where they can enjoy each other outside of the work.
We also wonder how come you seem like your arrival comes so fast every year. If you were not the last month and celebrations happening all over the place we might remember you.
Anyway welcome once again. We will have a great time celebrating. Yes we will remember you are part of it and not just the month. We will thank you at the end.