Hi Kaynay, if your LO can handle 1hr 45mins at the last A time perhaps he can handle it earlier in the day as well? an hour sleep can be either UT or OT depending on your LO, usually if they wake up and are crying, irritable etc it means they need more sleep, if they wake up happy then its an UT nap. Ideally you want a 12 hour day and 12 hour night, i wouldnt be looking at anything less at his age.