Oceanic eddies are also usually made of water masses that are different from those outside the eddy. That is, the water within an eddy usually has different temperature and salinity characteristics to the water outside the eddy. There is a direct link between the water mass properties of an eddy and its rotation.
It changed its name to Free, Sovereign and Independent Republic of Sri Lanka in 1968 and finally to its current name Democratic Socialist Republic of Sri Lanka in 1972. February 4 each year is celebrated as a national holiday in Sri Lanka.
Initially written as a tribute to Sri Lanka, the song gained massive popularity during the 1940s and finally became the national anthem on November 22, 1951. It was sung as the national anthem for the first time on February 4, 1952. Sri Lanka Matha represents sentiments of freedom, unity, and independence.