In Serbia, and among the Serb people living across the world, Saint Nicholas is the most widely celebrated family patron saint, celebrated as the feast day ("Slava") of "Nikoljdan". Since Nikoljdan always falls in the fasting period preceding Christmas, it is celebrated according to the Eastern Orthodox fasting rules ("Post"). Fasting refers in this context to the eating of a restricted diet for reasons of religion. This entails the complete avoidance of animal-sourced food products (meat, milk, dairy products, and eggs). Fish may be eaten on certain days