Uh, I have an piece of logic that helps me.
The bite happened in 1983 that's an Yes,but there are theories that it was actually foxy or mangle, but that can surely be true, but we've seen the actual cut scene where crying child was bit, so it's not possible. And I don't think that Michael as in the Fnaf 1st night guard is the same an sister locations, since we see an Easter egg where freddy is stuff, and most logically I think the night guard was stuffed in there for me. Then comes Elizabeth Afton, she is surely not the girl in the middle game, yes they light look same but no, since she was killed by William after Elizabeths death. So Elizabeth was surely crushed inside circus baby. And Michael afton is the night guard that got scooped, and Ennard is an minutes of the funtimes and others, but when Michael threw up, he threw up all the extra pieces of the animatronics, so leaving Ennard in his own endo, meaning he is another animatronic like Mangle. Then comes William, he was surely springlocked, there is no way that it was the older brother that was. And there is no proof that ballora is Ms Afton, from how ballora is made with her minireenas, I think she was supposed to be an mother figure to the kids, William could've based her on His wife still, but I don't exactly like when ms Afton comes in the whole lore actually.
This had nothing to do with the dates but its how I look into the lore. Hope you understand...
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