Christmas is coming, and it’s not just the geese that are getting fat. Celebrations over the holidays often revolve around gathering and feasting. In the northern hemisphere, baby it’s cold (and wet) outside and the long, silent nights may contribute to seasonal variations in physical activity.[1 2] Together, increased opportunities for eating, and decreased propensity for physical activity likely contribute to the 0.4 – 0.9 kg weight gain found in adults home for the holidays.[3]