While citrus maybe refreshingly associated with hot summers, an entire family of citrus fruits including different varieties of oranges and grapefruits are abundantly available in the market during the winter. I asked a person at the fruit section of my local store if citrus was in fact seasonal to the winter, and if so, why? He wasn’t sure why but he did agree about the seasonality. There are at least two culinary books organized by the seasons, one written by an acclaimed chef and another by an acclaimed preserve-maker that feature citrus prominently in recipes seasonal for winter, and sometimes only for winter.