When was the exact date when primitive people exist and gone?

Question

When was the exact date when primitive people exist and gone?

Answer 1

I believe it was a thursday late summer, at half past one, when they invented afternoon tea.

Answer 2

Erm... they exist right now!

Who knows when they will go away.

Answer 3

Question do you really want to know?

Answer 4

ermmm... this depends on how primitive your talking about.