According to Hindu belief , the history of the development of Nepalese civilization and culture can be traced back to the Age of truth. King Manu, who is said to be the first King of the world ruled Nepal in the Age of Truth (Satya Yuga) and Nepal was known as the Land of Truth (Satyawati). It was called the land of solitary meditation and penance (Tapovan) in the Silver Age (Treta Yuga). Similarly, Nepal was known as the ladder of slavation (Muktisopan) in the Copper Age (Dwapar Yuga); and it is known as ‘Nepal’ in the Iron Age, i.e., the present age of science and technology (Kali Yuga). The kings of the Solar dynasty ruled Nepal in the Age of Truth. They contributed much to the development of the Nepalese civilization and culture. The fact that we still follow the Solar Calendar in celebrating festivals and ceremonies testifies to the rule of the Solar Dynasty kings in our country