"Nineteen-eighty-five."

Whatever Lucius may think that reveals, Severus leaves up to him to ponder, and offers no further details nor inquires likewise. If they were from the same timeline, the last twelve hours would have already gone over in a vastly different way. And besides, it's not like Severus expects anything from the other man beyond tolerance.

Still- "I suppose you've heard the war never ends up going terribly well."

Understatement of the century.