What would you do?
Your LO (4.5 years old) normally goes to bed between 7.15-7.45pm, but after a week of being unwell and a big day at grandma's house he/she falls asleep on the couch at 5.30pm! (They flake it as soon as they lye down).
a) Wake them up and try keep them up a little longer (maybe until around 6.30/7pm).
b) Take them straight to bed and hope they sleep in until their normal time in the morning