Name announcement

So, hubby and I knew the names we want to give our littles for a long time before we got pregnant. Now that we’re in our second trimester, the name question comes up with almost everyone we talk to about our pregnancy. But, we’ve already decided that we don’t want anyone to know the name we’ve chosen until the baby is born. Most people we explain this to (especially family) seem almost offended that we would know the baby’s name but not be willing to shout it from a mountain top somewhere. Honestly, it’s not going to change the decision we’ve made to wait. But, it sure makes me wonder - when do most people announce the name of their baby?