Why Wait Until New Years?

Why do so many people wait until New Years to start getting healthy. It' s a New Years Resolution that a lot of people don't stick to all year. After so many days or months they give up. In my case that was me a few New Years ago. Until I heard that why not start now rather than to wait until the start of the new year to start eating healthy. You'll just gonna gain a lot more weight and it's gonna be harder for you to lose it. That is how I see it.