advice. Eddison usually wakes up from last nap at 430-5. he's 5 months. I try to put him to bed…

advice. Eddison usually wakes up from last nap at 430-5. he's 5 months. I try to put him to bed around 7-730. here recently he's trying to just cat nap for 20 min then stay up late like 830-930 so should I skip the last nap ?? or have it earlier??? I don't know what to do. but he gets up super early 4-6 no matter how late he stays up so I would like him to go to bed early.