Queen Victoria replaced him. Salisbury remained prime minister for the remainder of Victoria's reign. On 23 September 1896, Victoria surpassed her grandfather George III as the longest-reigning monarch in British history. The Queen requested that any special celebrations be delayed until 1897, to coincide with her Diamond Jubilee, which was made a festival of the British Empire at the suggestion of the Colonial Secretary, Joseph Chamberlain. The prime ministers of all the self-governing Dominions were invited to London for the festivities. One reason for including the prime ministers of the Dominions and excluding foreign heads of state was to avoid having to
Diamond Jubilee of Elizabeth II of Queen Elizabeth II and Prince Philip throughout her reign. Prime Minister John Key moved a motion in the House of Representatives congratulating the Queen on her Diamond Jubilee on 7 February. The Governor-General-in-Council also launched, two days later, via the Ministry of Health, the Queen Elizabeth II Diamond Jubilee Research Grant, "seeking to purchase research projects that transfer knowledge from initiatives with proven effectiveness, into practice in the health sector". The New Zealand Army Band took part in the Diamond Jubilee Pageant held at Windsor Castle and also took part in the changing of guard ceremony at Buckingham Palace.