The Festivals in Sri Lanka make for a great cultural experience, so when planning a trip to the island, doing so around a festival will let you experience the country in a rather interesting way. They all come with extravagant celebrations of Peraheras (parades), music, dancing, food, and colour. Some major festivals which you must know are  Sinhala and Tamil New Year celebrated in April, Vesak during Full moon in May, Kandy Esala Poya Perahera during Full moon of July or Aug and Deepavali in October or November.