The translation of the Yiddish appears to be:
This is my son Israel.
Next month, on 7/16 he is turning 24...and to many long years
Israel is a first cousin of my mother-in-law and the son of her uncle Usher (Morris Goldstein's younger brother). Now I have a birthday for him - July 16 (sometime in the 1940s).
Thank you to those at the Jewish Genealogy Portal Facebook group for assistance in the translation.