Is this sleep regression?

My son used to be a very good sleeper, sleeping from 7pm-5am with a. 2 hour nap.

Now at 22 months old, he all of a sudden doesnt want to go to bed at 7pm and instead 8pm. Wakes at 11pm screaming and crying, I put him back to bed. Then he wakes up ar 4:40am ready to start his day… and seems totally fine

He still takes his 2 hour nap at daycare.

This doesnt seem like enough sleep to me? I have no clue why the sudden change

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