Custom Lifespan Won't Effect Babies

I customized a lifespan using MCCC, but it doesn't effect babies. I set the baby stage to be six days long, but all of the babies born have two days until aging up, per default. Idk how to fix it. I have a similar issue with sims fresh out of CAS, who have the default 24 days until their birthdays no matter the lifespan. However, that is easily-fixable by setting their days back to 0 using the same mod. I cannot do this with babies because they are objects. Does anyone have any idea on how I can fix this? It's really important to me because I'm playing a historical challenge and I need to keep track of how old everyone is based on the current year and the year they were born in.