Vesak Full Moon Poya Day, also known as Vesak Day, is one of the most sacred and significant festivals in Sri Lanka. The holiday usually falls in the month of May, on the day of the full moon, which is why it's referred to as Full Moon Poya Day. This special holiday commemorates three pivotal events in the life of Gautama Buddha - his birth, enlightenment, and passing away (Parinirvana). Buddhists all over the country observe this holiday with great reverence and devotion.

Various festive activities and rituals mark the celebration of Vesak Full Moon Poya Day in Sri Lanka. Devotees flock to temples to offer prayers, chant religious hymns, and participate in the Sil campaign, a strict code of moral conduct to be observed for the day. The Seema Malaka Temple in Colombo is a prime location for observing and participating in these sacred rituals. The entire country shines brightly with decorative lanterns, pandols, and colorful processions known as Vesak Thorana and the atmosphere is filled with profound serenity.

One of the most salient features of Vesak Full Moon Poya Day is the practice of 'Dansal': free offering of food, drinks, and refreshments to the public by devout Buddhists. This act of generosity and sharing upholds the Buddhist principle of giving, known as Dana. It is also common to see birds, insects, and animals being released as a symbolic gesture of liberation, alluding to Buddha's teachings on compassion and non-violence. Overall, Vesak Poya Day in Sri Lanka is not just a religious holiday but a festival that welcomes everyone to embrace the spirit of peace, compassion, and enlightenment as taught by Buddha.