When did the Apollo 8 crew become the first humans to visually witness the far side of the Moon?

Answer

December 1968

The crew of Apollo 8—Frank Borman, Jim Lovell, and William Anders—achieved the first direct human visual experience of the far side in December 1968, nearly a decade after the first photographic evidence.

When did the Apollo 8 crew become the first humans to visually witness the far side of the Moon?
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