1) Hinduism - c. 1500 BC.
Source I believe would be Max Mullar and his Aryan Invasion. He was not only wrong, he fudged his data deliberately.
Mahabharata contains astronomical data that is EITHER observed or BACK CALCULATED by SUPER super brains. It points to at least 5100 BP.
Ramayana is still older. Its data points to time about 6000 BP.
Vedas are still older. But hold on. We have already gone earlier than 6000 BP, when the world was allegedly created.
What is internal data within Gen pointing out is from 4500 BP? ZERO