It's hard to name a dessert as sweet, iconic and American as pie, yet the classic dish tends to be overshadowed by other sweets and only served on special occasions such as Thanksgiving. Luckily, Jan. 23 is National Pie Day, a holiday created simply for celebrating the quintessential American dish. The “pie” part of pie day often takes on a number of meanings: Pie obviously can refer to a delicious dessert, or a savory dinner or a mathematical constant (pi). Because of this, there are multiple ways in which you can participate in the festivities. A pie by any other name would smell as sweet (unless it’s pi).