Krishna Janmashtami (Devanagari कृष्ण जन्माष्टमी kṛṣṇa janmāṣṭamī), also known as Krishnashtami, Saatam Aatham, Gokulashtami, Ashtami Rohini, Srikrishna Jayanti, Sree Jayanti or sometimes simply as Janmashtami, is an annual celebration of the birth of the Hindu deity Krishna, the eighth avatar of Vishnu. The festival is celebrated on the eighth day (Ashtami) of the Krishna Paksha (dark fortnight) of the month of Shraavana (August–September) in the Hindu calendar. Krishna was the 8th son of Devaki and Vasudeva.
Based on scriptural details and astrological calculations, the date of Krishna's birth, known as Janmashtami, is 19 July 3228 BCE and he lived until 3102 BCE. Krishna belonged to the Vrishni clan of Yadavas from Mathura, and was the eighth son born to the princess Devaki and her husband Vasudeva.
Following the birth, Vishnu ordered Vasudeva to take Krishna to Gokul to Nanda and Yashoda, where he could live safely, away from his Uncle Kansa. Vasudeva took Krishna with him and crossed Yamuna to reach Gokul. There, everyone was asleep; so he quietly kept him there and returned with Yashoda's daughter. Kansa, thinking her to be Devki's eight child, threw her on a stone. But she rose into the air and transformed into Yogmaya (who is Vishnu's helper) and warned Kansa about his death. Then, she disappeared. Krishna grew up in Gokul with his brother, Balram. He then returned to Mathura and killed Kansa with the help of Balram.
Hindus celebrate Janmashtami by fasting and staying up until midnight, the time when Krishna is believed to have been born. Images of Krishna's infancy are placed in swings and cradles in temples and homes. At midnight, devotees gather around for devotional songs, dance and exchange gifts. Some temples also conduct readings of the Hindu religious scripture Bhagavad Gita.