What is too early to start trick or treating

Andrea • Mama of 2 girls 💕 and first boy due April 2018 💙

So with Halloween coming up on Tuesday I want to know what an appropriate time to start trick or treating is. When I was in elementary school we got out of school at 3:30pm so when I got home with my siblings we would head out around 4:00pm. My three year old daughter has swimming lessons from 4:50 to 5:20pm and then I’m probably gunna grab some fast food for supper and take them back out trick or treating. Anyways would 3:30pm be too early to start going out with my 3 and 1 year old daughters?