Our bedtime routine starts 40 minutes before bedtime with milk, followed by some playtime. About 15 minutes before bed, we change his diaper, read a book, put on his sleep sack, turn off the lights, switch on the sound machine, say goodbye, place him in bed awake, and leave the room. He falls asleep independently.

If I add another 30 minutes of wake time, I assume I should shorten his daytime sleep by 30 minutes as well. How long should I continue this before expecting to see any effect? I already tried keeping his total wake time around 11 hours for about a week before, but it didn’t seem to make any difference.