I think that the funtimes were created early in the timeline because of the springlock suit that Mike is in during night 4 of SL. Also Elisabeth room being empty in the fnaf 4 mini games suggests that she died before the events of fnaf 4, that’s why I think the funtimes were created before fnaf 4 (maybe she died in 1983 too but idk) and SL happening before fnaf 2 (so Michael can be a corpse during fnaf 2 so when he gets fired for the reason of odor)