Daily routine

My son will be two years old the end of September and we’ve had him on a good routine since about 16 months. Wake up at 8am, naptime from 11-1, bedtime at 7:30/8pm. It’s been consistent mostly but sometimes he’ll wake up and hour early or an hour later in the mornings. My question is when he does wake up earlier/later should I do the naptime early/later (3 hours after he wakes up no matter the time) or still keep it at 11?

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