4004 BC according to Bishop Ussher, but there are other dates calculated by others ranging from 3700 to 5760 (Barry Setterfield).
Perhaps only a minor thing to some, but it must be remembered that neither Adam or Eve were born as humans ever since are: they were created.
There was no Adam and Eve. Modern humans (Homo-sapiens) have been on earth for at least 200,000 years. Those old myths have no basis in truth.
Aas far as the writings of the Bible and according to biblical theory Adam lived approximately 4000 to 5500 BC