This is normal. As a kid, you’re asked about your age much more often, and you’re often thinking about it as you look forward to hitting milestones - reaching a certain grade, your next birthday, legal age for driving, voting, drinking, and so on. Once you’re in your mid to late 20s it starts to matter a lot less, and people tend to have to do math, or if you’re like me, just ask your spouse.

Do you mean properly?