to find it odd when people refer to their childs age in months? (after 18 months)

[HarlowEver]

I had someone tell me today that their child was 24 months.

So 2 then yeah?

Aibu?

I know someone who has a dd age about 4 and she counts in weeks with her. She puts progress reports up and always states her age like "here is x at 193 weeks"

It's all to do with clothes sizes and how big a gap between a 21 month old and an 18 month old is. I had an argument with my mother about this, she thought I was BU!!! I wasn't. your child is 24 months? 2 then? your child is two? I don't say I'm xYears xMonths old do I?
but no, YANBU!