My current Chandler's Ford Today post travels back in time 600 years to bring news from Agincourt (!) though in fairness it shares news of a new woodland trail, a festival and an interactive map (worn as a scarf!) launched by the Road to Agincourt project.
So what do your characters remember? Stories can look at personal histories, society histories and so on. What is important enough to be included in your fiction? Even if you don't bring histories directly into your stories, there should be some sense of your world having existed and what is important to that world. What is important to that world should be important to your character(s), unless they've deliberately chosen to rebel against that and if they have done this, why? What aspect of to he history do they dislike and why?
My Eileen has written has own version of Fairy Kingdom history which is far more critical of her own side than the official version. She has no regrets over this and only her status as the Fairy Queen's cousin and heir stopped her getting into serious trouble over this. So who writes the histories in your fictional societies? Who controls it?