Sahastrabahu Arjuna is popular in Hindu Puranas as the thousand armed king who defeated Ravana. Sahastrabahu Arjuna Jayanti 2017 date is October 27. It is observed annually on the Shukla Paksha saptami day (seventh day of the waxing phase of moon) in Kartik month. He is a contemporary of Sri Ram.
Legend has it that Sahastrabahu had thousand arms and once even defeated the demon king Ravana of Ramayana. It is also believed by some Hindu communities that Sahastrabahu is an incarnation of the Sudharshana Chakra of Vishnu.
Sage Dattatreya was the guru of Sahastrabahu. It is believed that he got his thousands arms as a blessing from Sage Dattatreya.
Legend has it that once he blocked Godavari using his thousand arms to take bath with his queens. This enraged Ravana who was bathing on one side of Godavari. It is said that in the battle that followed Sahastrabahu humbled the Ravana.