Krishna (/ˈkrɪʃnə/; Sanskrit: कृष्ण, Kṛṣṇa in IAST, pronounced [ˈkr̩ʂɳə] ( listen)) is a major Hindu deity worshiped in a variety of different perspectives. Krishna is recognised as the Svayam Bhagavan in his own right or as the complete/absolute incarnation of Lord Vishnu. Krishna is one of the most widely revered and popular of all Hindu deities. Krishna's birthday is celebrated every year by Hindus on the eighth day (Ashtami) of the Krishna Paksha (dark fortnight) of the month of Shraavana in the Hindu calendar.
Krishna is also known as Govinda, Mukunda, Madhusudhana, and Vasudeva. Krishna is often described and portrayed as an infant eating butter; a young boy playing a flute, as in the Bhagavata Purana, a young man along with Radha; a young man surrounded by women; or as an elder giving direction and guidance, as in the Bhagavad Gita. The stories of Krishna appear across a broad spectrum of Hindu philosophical and theological traditions. They portray him in various perspectives: a god-child, a prankster, a model lover, a divine hero, and the Supreme Being. The principal scriptures discussing Krishna's story are the Srimad Bhagavatam, the Mahabharata, the Harivamsa, the Bhagavata Purana, and the Vishnu Purana. The anecdotes and narratives of Krishna, in topic, are generally titled as Krishna Leela.
Worship of the deity Krishna, either in the form of deity Krishna or in the form of Vasudeva, Bala Krishna or Gopala can be traced to as early as the 4th Century BC. Worship of Krishna as Svayam Bhagavan, or the Supreme Being known as Krishnaism, arose in the Middle Ages in the context of the Bhakti movement. From the 10th Century AD, Krishna became a favorite subject in performing arts and regional traditions of devotion developed for forms of Krishna, such as Jagannatha in Odisha, Vithoba in Maharashtra and Shrinathji in Rajasthan. Since the 1960s the worship of Krishna has also spread to the Western world and to Africa largely due to the International Society for Krishna Consciousness (ISKCON). Gaudia Math is also a leading proponent of Krishna worship.
Some religiously oriented scholars have tried to calculate dates for the birth of Krishna, some believing that Krishna, under the name of "Vasudeva Govinda Krishna Shauri," flourished as the ruler of Shuraseni and Vrishni tribes on the now-submerged island of Dwaraka (off the coast of Gujarat, India) sometime between 3200 and 3100 BC.
Source : WikiPedia