Nothing

what

end of a century / end of an era; fin de siècle / (chiefly fiction) end of the world

beforehand; in advance

oral history

historicism

historian

(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

study of history

historic, historical / already-happened, past / former, old, traditional