Buddha's Birthday is known as Vesak and is one of the major festivals of the year. It is celebrated on the first full moon day in May, but when it's a leap year it falls in June. * Magha Puja Magha Puja is an important religious festival celebrated by Buddhists in Thailand, Cambodia, and Laos on the full moon day of the third lunar month (this usually falls in February). * Asalha Puja Day Also known as "Dhamma Day" celebrates the Buddha's first teaching on the full moon day of the 8th lunar month, approximately July. * Uposatha * Kathina Ceremony * Abhidhamma Day * Songkran * Ulambana