Sri Lanka celebrates it independence day anniversary on feb 4. This year it is its 60th anniversery. Sri Lanka received independence from the British government in 1948. The Sri Lankan independence movement was a peaceful political movement to aimed at achieving independence for Sri Lanka from British imperial rule.

ndependence day ceremonies will be held at Galle Face in Colombo under the patronage of His Excellency Mahinda Rajapaksha. The military parades will feature the Armed Forces with the Air Force putting on a spectacular air shot. The Navy, Police and school children will also participate at the occasion. The Maha Sangha, and other religious leaders with Ministers and other Government officials will participate at the grant ceremony. Heads of the Armed Forces and foreign diplomats will also be present.

The British negotiated the island’s dominion status with the leader of the State Council, D.S. Senanayake, during World War II. Senanayake was also minister of agriculture and vice chairman of the Board of Ministers. The negotiations ended with the Ceylon Independence Act of 1947, which formalized the transfer of power. Senanayake was the founder and leader of the United National Party (UNP), a partnership of many disparate groups formed during the Donoughmore period, including the Ceylon National Congress, the Sinhala Maha Sabha, and the Muslim League. The UNP easily won the 1947 elections, challenged only by a collection of small, primarily leftist parties. On February 4, 1948, when the new constitution went into effect (making Sri Lanka a dominion), the UNP embarked on a ten-year period of rule.
Divisions in the Body Politic.

The prospects for an economically robust, fully participatory, and manageable democracy looked good during the first years of independence. In contrast to India, which had gained independence a year earlier, there was no massive violence and little social unrest. In Sri Lanka there was also a good measure of governmental continuity. Still, important unresolved ethnic problems soon had to be addressed. The most immediate of these problems was the “Indian question,” which concerned the political status of Tamil immigrants who worked on the highland tea plantations. The Soulbury Commission had left this sensitive question to be resolved by the incoming government.

After independence, debate about the status of the Indian Tamils continued. But three pieces of legislation–the Ceylon Citizenship Act of 1948; the Indian and Pakistani Residents Act No. 3 of 1948, and the Ceylon Parliamentary Elections Amendment Act No. 48 of 1949–all but disenfranchised this minority group. The Ceylon Indian Congress vigorously but unsuccessfully opposed the legislation. The acrimonious debate over the laws of 1948 and 1949 revealed serious fissures in the body politic. There was a cleavage along ethnic lines between the Sinhalese and the Tamils, and also a widening rift between Sri Lankan Tamils and Indian Tamils.

In 1949 a faction of the Ceylon Tamil Congress (the major Tamil party in Sri Lanka at the time) broke away to form the (Tamil) Federal Party under the leadership of S.J.V. Chelvanayakam. The creation of the Federal Party was a momentous postindependence development because it set the agenda for Tamil exclusivity in Sri Lankan politics. Soon after its founding, the Federal Party replaced the more conciliatory Tamil Congress as the major party among Sri Lankan Tamils and advocated an aggressive stance vis-à-vis the Sinhalese.
Sources:
Country Studies
Wikipedia
About Sri Lanka