November 30, 2021
The Buddhist calendar is the lunisolar calendar used for holidays in Buddhist communities and particularly widespread in the countries of Theravada Buddhism: Thailand, Burma, Sri Lanka, Cambodia and Laos. The Buddhist calendar originates from the third century calendar described in the Indian treatise Surya Siddhanta The months are alternately 30 and 29 days, with a leap month (adhikamasa) added every 19 years and 11 leap days (adhikavara) added over 57 days. years. The average year thus turns out to be 365.25875 days, slightly longer than the sidereal year and considerably longer than the tropical year.