DD is 5yo and in reception year at school.
On a school day, if coming home with no play date, we will all eat together as a fmaily at 6:30pm, when DH gets home. She will have a small snack - fruit, veg sticks, rice cakes, cereal bar, toast, etc. at 4pm, when inf rom school.
If she has a friend round or goes to a friends, they tend to eat between 5 and 5:30pm. DD will sometimes snack again at 6:30pm when Dh and me eat later.
DD then goes to bed at 7:30pm on a school date.
All this goes out of the window at weekends/holidays where we follow no routine and bedtimes are often later, sometimes much later.