Is there a way to "shift" a schedule for a 19 month old?

[Anonymous]

OP here -- day one of moving back the schedule -- 8:30 bedtime last night, and 4:30 wakeup, he absolutely was not even having going back to sleep and seems pretty happy this morning. I guess I should give it a few more days before switching him back to 7:30-4:30 in the hopes that it shifts a bit!