Or do you let them wake up naturally?

We put the babies to bed earlier last night (6:30pm) to see if that bedtime would work. Our boy woke up at midnight to nurse and then didn't wake up until 5:30am. Our girl slept through the night and woke up at 5:30am as well. I nursed them both and they fell back asleep around 6:00am. They are still sleeping. Should I wake them at 8am to start the day or do I let them sleep and just wake up on their own. They are 11 weeks, 8 weeks adjusted.