LO is 20 months old. He has been going down without a peep for bedtime for about 6 months, and bedtime was 8pm, or earlier if he acted grumpy/tired.

As of the past week, he cries, runs, says "no" in the most pitiful and obstinate ways if you say it's bedtime. We have been letting him stay up until 8:30 since he doesn't seem tired and he still DOES NOT want to go to bed. We feel awful shutting the door and listening to him wail.

Is he just going through a stage or is he not tired?? What's normal for this age?