ts traditions incorporate a great deal of influence from India, China, Cambodia, and the rest of Southeast Asia. Thailand's national religion Theravada Buddhism is important to modern Thai identity. Thai Buddhism has evolved over time to include many regional beliefs originating from Hinduism, animism as well as ancestor worship. The official calendar in Thailand is based on the Eastern version of the Buddhist Era, which is 543 years ahead of the Gregorian (western) calendar. For example, the year AD 2012 is 2555 BE in Thailand.