Belgrade
Explore Belgrade, the national capital. In the Old Town, visit Kalemegdan Park and Belgrade Fortress overlooking the confluence of the Sava and Danube rivers. Nearby landmarks include the Orthodox Cathedral (Saborna Crkva) and Princess Ljubica's Konak, an 1831 Turkish-style residence.
The 46-day Lenten fast for Serbians and other Orthodox Christians is strict. Western Christians, for whom Sundays are exempt, fast for 40 days unlike Orthodox Christians who also fast on the six Sundays in Lent.
The main Church of Serbia and Montenegro is the Orthodox Church. Like Russia, the tradition is to use the Julian calendar as opposed to the modern Gregorian calendar - at least when it comes to holidays and traditions. Day to day life is ruled by the Gregorian calendar.