The date of the Gita are not known with certainty and scholars of an earlier generation opined that it was composed between the 5th and the 2nd century BCE. However, within the text of the Bhagavad Gīta itself, Lord Krishna states that:
the knowledge of Yoga contained in the Gīta was first instructed to mankind at the very beginning of their existence.
A few books claims that the Bhagavat Gita is over 5,000 years old.