Our soon-to-be daughter had on a jean dress the first day we met her as well
What a cutie
I can see the benefit of just taking whatever you are comfortable with and then also trying to blend in a bit. Whenever we travel internationally we always try to match our clothing so that we don't stick out so much. We'll be in a small town for our bonding which gets zero tourism so we will easily stick out like a sore thumb. My guess is that in a small town that people will have no issues telling us how we have dressed the kids inappropriately. Maybe it is different with the cities that have more tourism.
My past experience with kids clothes in eastern europe was about a year ago when we were in Moldova. It was winter so every mom and babushka had an opinion on ds's clothes. My ds hated being bundled up so I mainly just smiled, pretended not to understand and moved on. One day, my ds didn't want to put his hat on. It wasn't that cold so I didn't push it really. I had three ladies ask me if he was cold and I just said no. However, when an older gentleman came up to me insisting that I put a hat on my ds, I felt like I must have reached a limit. So I was a bit more forceful in asking ds to put his hat on. He did just so that people would stop asking him if he was cold. Maybe people don't care so much in the summer.