My lo is currently 13 months plus. Need to cut his nap from twice to once per day? If yes, not sure how to do it as he gets cranky when he miss a nap.

I don't think you need to cut his nap, is there any reason why you want to do so? I think it's best to just let them sleep and eat on demand, no real need to adjust their schedules because they'll do so on their own :)

My LO slp 10+ once and 2+ once. So at night he will not so early cranky. If they are too active, they tend to get cranky at night. Of course depend wat time ur LO wake up.

your child is 13 months old. he needs his two naps perday. i don't get why you would want to cut his naps to once a day. sleep is when they grow.

If your LO would like to take nap twice per day, suggest you to follow your LO's que. Is there a special reason to shorten to one nap?

If he is able to take 2 nap a day, stick to it. Sleeping is good for their brain developement

I would follow LO's que.