According to the history of the Sasana, the first of the four omens of an old man that caused the princes Siddhartha to decide to go for Ordination was the appeared on a full moon day like today.

Also the second visit of the Lord Buddha to Nagadeepa took place on a full moon day like today.

According to the history of the Sasana,Load buddha came to Sri Lanka to suppress the battle between Chulodara and Mahodara Naga kings over the right to a gem plate and according to Buddhist history, the two Na kings, who were at war after hearing the teachings of the Buddha, offered the gem plate to the Buddha.