If your grandson was born on August 17 then that would make him a "Leo".
What Is The Sign For August 17?
That would be a Leo and we are the leaders of the pack. Leos are some of the most dominant and shyest at the same time. I wish you the best in enjoying watching your grandson growing up.
Usually hot with heavy thunderstorms and looks like a lot more till the end of the month which should be September this year...