Naraka Chaturdashi is an annual Hindu festival that falls on Chaturdashi of the Krishna Paksha in the Hindu calendar month of Ashvin or Kartika. It is the second day of the five-day long festival of Diwali. Hindu literature narrates that the asura Narakasura was killed on this day by Krishna and Satyabhama. The day is celebrated by early morning religious rituals, followed by festivities. From Wikipedia