Paczki Day is celebrated on the Thursday before Ash Wednesday, particularly among Polish Americans, as a day to indulge in the famous Polish pastry known as paczki. These sugary pastries, similar to donuts, are typically filled with fruit and are enjoyed as a way to use up household supplies like lard, sugar, and eggs before the fasting period of Lent begins. In Poland, this day is also known as Fat Thursday, marking the start of the final week before Lent. The tradition of making and consuming paczki dates back to the Middle Ages, evolving over time to include modern flavors such as lemon, Nutella, and strawberry. On this day, families and friends gather to make and binge-eat paczki, celebrating the opportunity to enjoy these treats before the restrictions of Lent.