Festival of the Sikh Holy Book
Festival of the Sikh Holy Book is held on October 20. This event in the second decade of the month October is annual. 
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Guru Granth Sahib or Adi Sri Granth Sahib Ji (Punjabi ਗੁਰੂ ਗ੍ਰੰਥ ਸਾਹਿਬ; also called Adi Granth or Adi Guru Darbar) is more than just a scripture of the Sikhs, as the Sikhs consider and respect the Granth (holy book) as their living Guru. The revealed sacred text comprises 1430 pages and contains the actual words spoken by the founders of the Sikh religion (the Ten Gurus of Sikhism).
Guru Gobind Singh, the 10th and last incarnate Guru of the Sikhs, installed the holy scripture Adi Granth as Guru Granth on October 20, 1708. Before his death, Guru Gobind Singh Ji decreed that the Sikhs should consider the Granth Sahib as their next and eternal Guru.
This day is now celebrated as Guru Gadi Divas (enthronement day). At the time of his death, Guru Gobind Singh declared that the Word of God embodied in the Guru Granth Sahib should be his spiritual successor for all time. He commanded his disciples: "It is an order to all Sikhs from now on to accept only the Granth".
Similar holidays and events, festivals and interesting facts
Fair in Ottweiler-Fürth on October 19
Blessed Charles of Austria on October 21 (Roman Catholic Church);
Indian Police Commemoration Day in India on October 21
Austrian Sparkling Wine Day on October 22
Library Day in Germany and South Tyrol on October 24 (in Germany since 1995, South Tyrol - since 2009);
Bavarian Dentists' Day on October 24 (Beginning on Thursday of the fourth week of October);
Rheinhessen Wine Forum in Mainz on October 25