The end of a year really does correspond to a lot of things that end. The tax year, project deadlines, the big holiday season is over, reconnecting with family via reunions, etc. There very much can be a feeling of wiping the slate clean and starting fresh, and that isn't just a superstition; it aligns with things that actually happen in our lives.
So there's nothing wrong with using that extra bit of space of psychic room to do some reflection and come up with some new goals.