When did you start saying your baby was blank months old versus blank weeks old?

I used weeks until she was about 6 months lol

I honestly used months since 1 month old

I think after 12 weeks I went to months lol

I used months from about 4/5 months, she’s now 16 months and I still use months because although she is 1 there’s such a huge difference between 16 months and 22 months, for example. But from 2 I will just use years 😂

I used it till about 16 weeks because he had his vaccines so I knew what week we were on but then I lost track and just went by months 🤣 He's 18 months now and I just say he's 1 and a half