Start of Gal Oya riots, the first reported ethnic riots that target minority Sri Lankan Tamils in the Eastern Province. The total number of deaths is reportedly 150.

The Sri Lankan riots of 1977, targeting the minority Sri Lankan Tamil people, begin, less than a month after the United National Party came to power. Over 300 Tamils are killed.

Eastern University massacre, massacre of 158 Tamil civilians by Sri Lankan army at the Eastern University in Batticaloa, Sri Lanka.

Bandaranaike Airport attack is carried out by 14 Tamil Tiger commandos, all died in this attack. They destroyed 11 Aircrafts (mostly military) and damaged 15, there are no civilian casualties. This incident slowed down Sri Lankan economy.

A massacre, is carried out by Sri Lankan government forces, killing 17 employees of the French INGO Action Against Hunger (known internationally as Action Contre la Faim, or ACF).