All these normal bed times and my 6 month old goes to bed at 11:30..
6.5 months here and it depends when he has his last nap. If he naps around 4 he'll have a 7-7.30pm bed time. Sometimes he naps at 5 or 6 and then he has an 8-8.30 bed time. All of this depends on what time he woke that morning because he consistently lasts 2-3 hours between his naps throughout the day.