Krishna Janmashtami (Devanagari कृष्ण जन्माष्टमी, IAST: Kṛṣṇa Janmāṣṭamī), also known simply as Janmashtami, is an annual Hindu festival that celebrates the birth of Krishna, the eighth avatar of Vishnu. It is observed according to Hindu luni-solar calendar, on the eighth day (Ashtami) of the Krishna Paksha (dark fortnight) in the month of Shraavana of the Hindu Calendar, which overlaps with August and September of the Gregorian calendar.