As per the Gregorian calendar, Guru Gobind Singh Ji was born on December 22, 1666, at Patna Sahib, the present-day Patna in Bihar, India. However, the annual celebrations are observed as per traditional NanakShahi calendar. Guru Gobind Singh Jayanti is a public holiday. We wish people Guru Gobind Singh Jayanti di lakh lakh vadhaiyan.