We go to Dr. Weissbluth, the nationally-known sleep expert at Northwestern because both our kids had trouble sleeping. According to Weissbluth, who has studied sleep in infants and children for decades, babies, including those who are 6 months old, should not be awake for more than 2 hours straight a day--their naps should begin before they are awake for more than 2 hours straight. Weissbluth would say that you are doing the right thing and would definitely use your case as a model! So many of us struggle to get our kids to do what your baby is doing, so you should congratulate yourselves for a job well done!! It's all about brain development--which happens when babies and kids get a good night's sleep without the interruption of waking up every 2 hours or being overtired. For more information about Weissbluth's research, you can check out www.sweetbabies.com. This is not about a growth spurt. Your baby should continue the nighttime sleep schedule for years to come. My 10 year old went to sleep at 6:45 until he was 7. Now he goes to bed at 8pm. My 22 month old daughter has been falling asleep at 4pm since she was 4 months and gets up at 6am. Weissbluth was so happy to hear that and said we should definitely not move her bedtime to a later time. If the babies fall asleep when they are put to bed, then it's time for them to go to sleep! If they talk for more than 40 minutes, then you can move the time up a little, but if they cry when you put them to bed, then you're doing it too late because they are overtired, thus the crying. Your situation is perfect and you should relax and enjoy your evenings!! The naps will probably change sometime in the next year, but some kids continue to nap more than others past their first birthday.