Today is celeberated as  Guru Gobind Singh Ji Jayanti, also called Prakash Utsav or Prakash Parv. Guru Gobind Singh Ji Maharaj was one of the ten revered Sikh gurus.

Gobind Rai, who would later be named as Guru Gobind Singh, was born to the ninth Guru of Sikhism, Guru Teg Bahadur and Mata Gujri at Patna Sahib or Takht Sri Patna Sahib (now in Patna). He ascended after his father Guru Teg Bahadur accepted martyrdom in the hands of Mughal Emperor Aurangzeb to protect the Kashmiri Hindus.
Guru Gobind Singh, Creator of Khalsa Panth, is known to have initiated the five ‘K’s that the Sikhs devotedly abide by:
Kesh: uncut hair
Kangha: a wooden comb
Kara: an iron or steel bracelet worn on the wrist
Kirpan: a sword
Kacchera: short breeches
Before leaving his mortal body in 1708, Guru Gobind Singh decreed the Guru Granth Sahib as the next and perpetual Guru of the Sikhs.

The following are battles fought by the tenth master, Guru Gobind Singh

• The Battle of Bhangani ( 1689): Won against Raja Bhim Chand of Bilaspur.
• The Battle of Nadaun (1690): Won against the Mughals, in response to a request from Raja Bhim Chand.
• The Battle of Anandpur Sahib (1700): Against combined forces of the Mughals and the Hill Rajas. After a prolonged Siege, the Guru left Anandgarh Fort.
• The Battle of Chamkaur (1703): Forty Sikhs with the Guru fought valiantly against thousands of enemies and became martyrs. The two elder sons of the Guru also died fighting in this battle.
• The Battle of Muktsar (1703): Forty Sikhs, who had abandoned Anandpur Sahib, returned to the Guru and sacrificed their lives while fighting in his defence against a Mugal Army. They became martyrs and the Guru blessed them as muktas.