The term is also used for 75th anniversaries,[2][3][4] although the human lifespan makes this usage more common for institutions.[5] George III of the United Kingdom died nine months before his diamond jubilee was due in 1820.The longest reigning monarch in history, Sobhuza II of Swaziland, celebrated his (60 year) diamond jubilee in 1981, dating from when he gained direct rule.In 1984, the phrase "Diamond Jubilee" was used by Metro-Goldwyn-Mayer in its logo for the sixtieth anniversary of the studio.In 2025, Singapore will celebrate the diamond jubilee year from independence from Malaysia with the inaugural event on 31st December 2024.