When someone finds out new news only to find out that it's fairly old (originally from Super Milk Chan).
Person 1: Did you hear about the Prince of Persia movie?
Person 2: That news is from late LAST YEAR.
Person 1: Oh, well I didn't know.
Person 2: You are so behind the times.
Somebody who hasn't moved on since 500 AD.
Clovis is now behind the times as a barbarian. He's so unsophisticated, uncivilized, and behind his time.