Nayon is the third month on Myanmar calendar, in the hot season, and falls in May-June.
In the second Innwa Period, under the reign of King Thalun, in the year 1000 began the practice of holding examinations in religious scriptures in Nayon with aims at propagation of Pariyatti Sasana.
It was followed by the holding of Noviciation and ordination ceremonies in the next month of Waso.
Nowadays, Pahtamabyan examinations, Dhammacariya Examinations, Tipitaka Dhara Selection Examinations, Abhidhamma and Vissudhi Magga Examinations were held every year with presentation of prizes and certificates, for the flourishing of the Sasana.
Moreover, in this month of Nayon, what is called Maha Samaya Day was observed in commemoration of Lord Buddha’s preaching of Maha Samaya Sutta to celestial beings from ten thousand solar systems.