Sims keep having birthdays

Hi Josie2000866​ 

• is this with or without mods/cc ?
• Was the birthday the only thing that reverted ?
• Does this happen with all Sims or just a specific one ?
• If it was just a specific Sim, did you get that Sim through Cupid's Corner ?

Yes  just the birthday and I’m not sure if it’s my other sims because when I save and get back on later it  pushes my game back and it says it’s that specific sim’s birthday in a couple of days I tried saving after there birthday but it still doesn’t work.

Did you get the Sim through Cupid's Corner ?

What is that ? 

The dating app that came with Lovestruck. If you don't know what it is, it's probably a no :D

Is the Sim a premade/gallery Sim/created by you or ingame born ?

I don’t have lovestruck and my sim was born 

Hi Josie2000866​ 

you say they have their birthday again if you save and quit. What happens if you play on a while after they aged up, do they still revert back in age say after you go to CAS or travel or does it only happen when you quit and reload ?

Idk it just says it on the calendar and on there birthday I get a notification 

I would test if it works if you play a bit and see if it happens again.

Backup your save and do some travelling and saving (maybe even a save as) before quitting after the aging.