Janmashtami 2015, September 5th is Lord Krishna’s 5127th birthday. Janmashtami, also known as Gokulashtami, Krishnashtami, Sri Krishna Jayanti, Ashtami Rohini in various places of India, celebrates the birth anniversary of Lord Krishna.
As per the Hindu Scriptures, Lord Krishna was born around midnight on Ashtami tithi in Rohini Nakshatra (Vrishabha Rashi) in Shravana Month of Hindu calendar.
The Mahabharata leads us to the exact birth date of Krishna. The exact birth date of Krishna (predicted with the modern astronomical data systems) is – July 27, 3112 BCE as per Gregorian calendar.
Check this video for detailed Janmashtami Puja Procedure with Mantras and fully explained Puja steps..