The name of Sri Lanka was introduced in the context of the Sri Lankan independence movement, pushing for the independence of British Ceylon during the first half of the 20th century. The name was used by the Marxist Lanka Sama Samaja Party, which was founded in 1935. The Sanskrit honorific "Sri" was introduced in the name of the Sri Lanka Freedom Party (Sinhalese: ශ්‍රී ලංකා නිදහස් පක්ෂය "Sri Lanka Nidahas Pakshaya"), founded in 1952. The Republic of Sri Lanka was officially adopted as the country's name with the new constitution of 1972, and changed to "Democratic Socialist Republic of Sri Lanka" in the constitution of 1978.