Golden Temple attempted to reach Amritsar to liberate the Golden Temple. Within six months, on 31 October 1984, Indira Gandhi's Sikh bodyguards assassinated her. In 1986, Indira Gandhi's son and the next Prime Minister of India Rajiv Gandhi ordered repairs of the Akal Takht Sahib. These repairs were removed and Sikhs rebuilt the Akal Takht Sahib in 1999. One of the most important festivals is Vaisakhi, which is celebrated in the second week of April (usually the 13th). Sikhs celebrate the founding of the Khalsa on this day and it is celebrated with fervour in the Harmandir Sahib. Other important Sikh religious
Dal Khalsa (International) the followers of a Sikh sect known as the Nirankaris (whom other Sikhs regard as heretics). This clash had occurred at a Nirankari event at the Harmandir Sahib in Amritsar on 13 April 1978, in which 3 Nirankaris and 13 Sikhs were killed. At its first annual conference held in Gurdaspur during December, 1979, the Dal Khalsa passed a resolution demanding that Amritsar be officially declared a "holy city". A demand that was supported by other Sikh organisations such as the Sikh Students Federation and one which was later taken up with the Indian government by the SGPC in 1980.