The word you're looking for there is "seasoned"

Today's column in the Times Free Press was prompted, as many of them are, by something I read. The New Republic took apart the growing phenomenon of older parents and came up with lots of really good reasons for older parents to be scared about being older parents.

Some of those good reason were sciencey: Higher incidence of all kinds of physical and mental troubles for the offspring of older parents. And some of those good reasons were situational: Your parents are elderly and dependent, your children are tiny and dependent, you are middle-aged and completely exhausted.

But they didn't spend enough time exploring the awesome things about being an older parent. And since I am married to a man who is the 55-year-old father of two little boys, I just went ahead and wrote the missing part of that article. Because old dads kick ass.