Most 5 year old children go to bed between 6:00 PM and 7:00 PM.
A 5 year old should always be in bed by 7:00 PM at the latest so that they get enough sleep during the night.
My bed time when I was 5 years old was 6:30 PM and if I wasn't in bed by 6:30 PM I got a spanking so that made me want to go to sleep.
My children when they were 5 years old went to bed by 7:00 PM because I felt that 6:00 PM or 6:30 PM was too early for the 5 year old to go to bed.
That is especially during the summer months when it was still daylight out at 6:00 PM and 7:00 PM.
I sometimes let the 5 year olds stay up until 8:00 PM if they didn't need to be up early but when they needed to be up earlier then 7:00 PM is when they went to bed.