Happy Asalha Puja!
Today is Asalha Puja Day, also known as Dharma Day. This is one of Theravada Buddhism’s most important holidays. This special day in Thailand is to celebrate Buddha’s first sermon in which he set out to his five former associates, the doctrine that had come to him following his enlightenment.
Read about here: https://en.m.wikipedia.org/wiki/Asalha_Puja