So last night, at around 10pm, I heard some noises outside. I investigated to make sure it wasn't anything to be concerned about and found that it was our neighbors laying patio stones. I was hearing the back gate opening and closing and them scraping the stones and laying them (plus talking). I thought it was really strange to be doing so late but I realized maybe it's fairly normal.

Do you do your yard work at night? I'd be less caught off guard if it was a weekend or super hot yesterday but neither were the case (it was around 75 all day but breezy and kind of cloudy at times).