The day of Asalha Puja honors the Buddha's first sermon in the Deer Park in Benares, India, and the foundation of the Buddhist Sangha. In Thailand, it is also known as "Asanha Puja" or "Dhamma Day". The day is observed by listening to sermons and presenting offerings to the temples.
Buddhism is one of the largest eastern religions in the world. It is embraced by more than 520 million people around the world, most of them live in East Asia, making Buddhism the fourth largest religion in the world after Christianity, Islam, and Hinduism.