My DD was due (and born) on Aug. 5. Lots of people told me that being 8-9 months pregnant in the summer was going to be really uncomfortable because of the heat. I live in Hawaii. It's always about 80-85 degrees here, regardless of the season. I just pointed that out to them and most of them went, "Oh. Huh. I guess that's true."
I have a number of family members with birthdays in early to mid August and there was some good-natured campaigning for me to have DD on one of their birthdays. Like I had a choice. As it is, she's got her very own birthday that she doesn't share with anyone.
Overall though, I didn't get many people saying crazy, cruel or judgmental things. Maybe I got lucky.
Congrats on your pregnancy, OP. I'm sure whatever day the wee one arrives will be a fine one for him/her.