Navam Full Moon Poya Day is one of the key religious Buddhist events celebrated within the Sri Lankan calendar. It acknowledges two significant incidents that took place during the Buddha's lifetime; the first-ever Buddhist congregation as well as the appointment of the two chief disciples of Gautama Buddha, Sariputta and Moggallana.

This holiday occurs during the month of February. Navam Full Moon Poya Day is recognized with various religious practices including participating in religious ceremonies at Buddhist temples across the country, observing sil (practicing the five precepts), and meditation. The day is marked by colourful processions and musical performances, particularly in the city of Colombo, which illuminate the rich cultural ambiance of Sri Lanka.

On this day, Buddhism's followers flock to temples to reflect and take part in religious activities such as listening to sermons and discussions about Dhamma. Devotees often fast and refrain from consuming meat and alcohol as a sign of purification. The Navam Full Moon Poya Day is truly a profound celebration, reiterating the peace and harmony that Buddhism advocates, while also celebrating the religious, cultural, and historical contexts of Sri Lanka.