Charley...the idea of a 'Diamond Jubilee' is a bastardisation. A jubilee is, and can only be, a period of 50 yrs ( This from Wiki The concept of the Jubilee is a special year of remission of sins and universal pardon. In the Biblical Book of Leviticus, a Jubilee year is mentioned to occur every fifty years, in which slaves and prisoners would be freed, debts would be forgiven and the mercies of God would be particularly manifest. In Christianity, the tradition dates to 1300, when Pope Boniface VIII convoked a holy year, following which ordinary jubilees have generally been celebrated every 25 or 50 years; with extraordinary jubilees in addition depending on need. Christian Jubilees, particularly in the Catholic tradition, generally involve pilgrimage to a sacred site, normally the city of Rome.) Queen Victoria reached 50 years on the throne in 1887, and a Jubilee celebration was announced. 10 years later, when she reached an unprecedented 60 years, the idea of a diamond jubilee was suggested, with reference to the traditional wedding anniversary gifts. George V reached 25 years in 1935, and a 'Silver Jubilee' was announced, again with reference to the wedding anniverary gifts. Queen Elizabeth II had a silver jubilee, a jubilee, now wrongly identified as a 'Golden Jubilee' using the same logic, and now a diamond jubilee. Her mother lived till 100...so some new inventions may be on the way.