1835 The Royal College, Colombo in Sri Lanka is established with the name Hillstreet Academy.
1886 Ananda College, a leading Buddhist school in Sri Lanka is established with 37 students.
1935 The Lanka Sama Samaja Party is founded in Ceylon.
1942 World War II: The Japanese Navy attacks Colombo in Ceylon (Sri Lanka). Royal Navy cruisers {{HMS|Cornwall|56|6}} and {{HMS|Dorsetshire|40|6}} are sunk southwest of the island.
1948 Ceylon (later renamed Sri Lanka) becomes independent within the British Commonwealth.
1955 Albania, Austria, Bulgaria, Cambodia, Finland, Hungary, Ireland, Italy, Jordan, Laos, Libya, Nepal, Portugal, Romania, Spain and Sri Lanka join the United Nations.
1956 In Sri Lanka, the Mahajana Eksath Peramuna win the general elections in a landslide and S.W.R.D. Bandaranaike is sworn in as the Prime Minister.
1960 Ceylon (now Sri Lanka) elects Sirimavo Bandaranaike Prime Minister, the world's first elected female head of government.
1972 Ceylon adopts a new constitution, thus becoming a Republic, changes its name to Sri Lanka, and joins the Commonwealth of Nations.
1978 A chartered Douglas DC-8 crashes near Colombo, Sri Lanka, killing 183.
1981 Burning of Jaffna library, Sri Lanka, It is one of the violent examples of ethnic biblioclasm of the twentieth century.
1986 Akkaraipattu massacre: the Sri Lankan Army massacres 80 Tamil farm workers the eastern province of Sri Lanka.
1986 Twenty-one people are killed and forty-one are injured after a bomb explodes in an airliner (Flight UL512) at Colombo airport in Sri Lanka.
1987 The Tamil Tigers are blamed for a car bomb that explodes in the Sri Lankan city of Colombo, killing 106 people.
1987 Start of Operation Pawan by Indian Peace Keeping Force in Sri Lanka that killed few thousand ethnic Tamil civilians, several hundred Tamil Tigers and few hundred Indian Army soldiers.
1987 Jaffna hospital massacre is carried out by Indian Peace Keeping Force in Sri Lanka killing 70 ethnic Tamil patients, doctors and nurses.
1988 Sri Lankan Tamil mercenaries try to overthrow the Maldivian government. At President Maumoon Abdul Gayoom's request, the Indian military suppresses the coup attempt within 24 hours.
1989 A massacre is carried out by an Indian Peace Keeping Force in Sri Lanka killing 64 ethnic Tamil civilians.
1990 More than 127 Muslims are killed in North East Sri Lanka by paramilitary troops.
1990 Eastern University massacre, massacre of 158 Tamil civilians by Sri Lankan army at the Eastern University in Batticaloa, Sri Lanka.
1990 1990 Batticaloa massacre, massacre of 184 minority Tamil civilians by Sri Lankan Army in the eastern Batticaloa District of Sri Lanka.
1991 1991 Kokkadichcholai massacre: the Sri Lankan Army massacres 152 minority Tamil civilians in the village Kokkadichcholai near the eastern province town of Batticaloa, Sri Lanka.
1995 The Sri Lankan government announces the conquest of Tamil stronghold of Jaffna.
1996 An explosives-filled truck rams into the gates of the Central Bank of Sri Lanka in Colombo, Sri Lanka killing at least 86 and injuring 1,400.
1998 A suicide attack by the Liberation Tigers of Tamil Eelam on Sri Lanka's Temple of the Tooth kills 8 people and injures 25 others.
2004 A 9.3 magnitude earthquake creates a tsunami causing devastation in Sri Lanka, India, Indonesia, Thailand, Malaysia, the Maldives and many other areas around the rim of the Indian Ocean, killing over 250,000 people including over 1700 on a moving train
2005 Sri Lanka's foreign minister, Lakshman Kadirgamar, is fatally shot by an LTTE sniper at his home.