JJBA part timespans
Phantom Blood: 9 years (less than 3 months not counting childhood events before time skip)
Battle Tendency: 4 months
Stardust Crusaders: 50 days
Diamond is Unbreakable: 3 months
Vento Aureo: 8 days
Stone Ocean: 5 months (not counting two universe resets)
Steel Ball Run: 4 months
so what youre saying is that the jojos have fairly normal lives except for one crazy summer