I've never checked out the Hebrew date for him; though my husband and I celebrate our kids' (and our own) according to the Jewish Calendar.
My father's father didn't live long enough to be a grandfather, but my father and his two siblings are still alive, bli eyin haraa, the youngest being 80. My grandmother lived until about his age, and she then had six great-grandchildren. My father's third, will G-d willing be born within a couple of months, and his elder brother has two.
My father worked as a CPA for many years. He has survived an aneurysm and can still walk a mile or more without any pains.
G-d willing, he and my mother will be visiting us in Israel in a couple of months.