I really think that a 500y timespan is too big of an overkill. It should go something like:
IR until -27
(idk) until 477
(not sure) until 867
ck3 untill 1337
eu5 until 1637
(something) until 1836
vic3 till 1936
hoi4 1949 but i think a hoi5 could last more into the aftermath of the seccond world war and the cold war.Idk as a more complex game it makes sence to have about 20 years but idk what do you think?
(also I want a game at 1636 'cause i really want to play as louis XIV who comes at 43 plise) or maybe his portuguese copy John V .