If you have a new puppy, please do the right thing and consider that they are still unsure about you and their new home. Taking them out to meet new people during the day is fine, but taking them during fireworks is not going to build a POSITIVE ASSOCIATION with new people. Think about it - imagine you are a young child, a toddler perhaps. Your parents take you out to a really busy place, where there are a ton of people. You've only met a few dozen people in your life. You are small - these people are big - you can't see over them. You are probably in a bag (and hopefully not on the germ filled ground when you have a stressed low immune system). People are nice but your parents forgot to bring treats to give you when people pet you so you can associate good things when strangers come at you making loud noises and putting their stranger hands on top of your head (and effectively reinforcing dominant behavior). THEN, the world starts to end. You hear these loud BOOMS and you are freaked out and shaking - or if you feel the inside of them like some dogs do, you are having a serious panic attack. You jump out of your bag, you pull so much you slip your collar, and you're off running because your new parents don't seem to understand the world is ending - and WHY doesn't that hurt their ears so much too?!
Stay HOME! Turn on a loud fan, turn the TV on....give your pups HIGH VALUE treats (this means meat or dried meat - see Plato Pet Treats small bites) while the fireworks are going off.
Also, don't forget to do this during thunderstorms.