I'd say that unless a story is very time specific (like fighting the Nazis/Japanese or something related to Vietnam protests, the rise of Hippie culture, or specific music trends being new), they remember most cases they were in the Golden, Silver, Bronze, and Modern Ages.

This sadly makes most of the Hudson University Robin stories not count but we can't have everything...

Well no as the gold and silver age comic book characters are form different earths gold age characters are from earth-two well silver age earth one. the only surviving golden age hero was Superman (earth two) and yes he did remember the gold age, but not the silver age as he was not from earth one. however, convergence completely wiped out the first crisis is why we got the anti-monitor vs Darkseid fight. according to death metal, the universe was actually reset with each crisis. however Deathmetal stopped this reset. the earth prime multiverse is also now multiverse one with a the original multiverse now being a separate multiverse connected via the crack in the multiverse caused in infinite frounteir, which likely had new earth as its earth prime.

Right but New earth Batman remembers most of what earth one Batman does, but Earth One Batman only remembers earth one

@Guyver92 Just gonna point out that there's a difference between Earth Prime and Prime Earth. Earth-Prime is the Arrowverse, Prime Earth is the main comic book universe.

And there’s and Earth-Prime that’s Superboy-Prime’s home universe

Oh yeah, I forgot about that. Both are named Earth-Prime, but one is meant to be our reality (with Superboy-Prime there as well) and the other is the Arrowverse.

Actually that is really confusing as there had been a lot of recons during new earth. Given there are two accounts of batmans second year alone for batman (the long Halloween and batman year two). there is also two or three accounts on how Dick became Nightwing as well. one being robin dies at dawn were Bruce fires him after Dick is shot by the joker, then there is Nightwing year one. also new earth batman met Jason Todd when he stole the tires off the batmobile well earth one Jason was a circus brat like Dick. No New earth batman does not really remember earth one events. However there are some characters that do remember the original era's one example being Pscyco pirate and more recently Thomas Wayne of Flashpoint and these are Remnants.

BobRossTime your right i have trouble keeping them strait.

@Guyver92 year two didn’t happen on new earth because of the whole joe chill situation

Some stories from before the reboots did happen but slightly different like all star squadron annual 3 happening on new earth but without Batman, Superman or Wonder Woman