A Diamond Jubilee is a celebration held to mark a 60th anniversary.
Diamond Jubilees in the United Kingdom
Diamond Jubilee for Queen Victoria
On 22 September 1896, Victoria surpassed George III as the longest-reigning monarch in English, Scottish, or British history. In accordance with the Queen's request, all special public celebrations of the event were delayed until 1897, the Queen's Diamond Jubilee. The Colonial Secretary, Joseph Chamberlain, proposed that the Diamond Jubilee be made a festival of the British Empire. Thus, the prime ministers of all the self-governing colonies were invited along with their families. The procession in which the Queen participated included troops from each British colony and dependency, together with soldiers sent by Indian princes and chiefs (who were subordinate to Victoria, the Empress of India). The Diamond Jubilee celebration was an occasion marked by great outpourings of affection for the septuagenarian Queen, who was by then confined to a wheelchair.
Diamond Jubilee for Queen Elizabeth II
If she is still on the throne at the time, Queen Elizabeth II's diamond jubilee will be in 2012.which will also be the year of the London olympics.(the second world-wide sporting event that would coincide with one of her jubilees)