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
Sikhism charge of upkeep of the historical gurdwaras of Punjab, adopted Nanakshahi calendar. The new calendar is highly controversial among Sikhs and is not universally accepted. Sikh festivals include the following: Khalsa Sikhs have also supported and helped develop major pilgrimage traditions to sacred sites such as Harmandir Sahib, Anandpur Sahib, Fatehgarh Sahib, Patna Sahib, Hazur Nanded Sahib, Hemkund Sahib and others. Sikh pilgrims and Sikhs of other sects customarily consider these as holy and a part of their "Tirath". The Hola Mohalla around the festival of Holi, for example, is a ceremonial and customary gathering every year in Anandpur Sahib