Dates of Tibet festivals are traditionally based on lunar calendar, the lunar calendar is calculated each year by astrologers from Mentse Khang (Tibetan Traditional Medicine Centre). Normally a year contain12 months, but the missing or addition of an extra intercalary month for astrological reasons is not uncommon. So the festivals dates are vary in every year. Generally Tibetan Lunar month is about two months behind the western calendar.
Most of the Tibetan festivals on the Tibetan plateaus are deeply connected with their strong Buddhist influence or rich ancestral culture. During the festivals, all the people wear traditional costume and perform different traditional dances and ritual activities. Festival is the best way to experience the breathing culture and tradition of the local and their ethnical affinity.