3 month old sleep

I have a 13 week old who I follow wake windows with and all of that “sleep training” stuff. He usually takes about 4-5 naps a day and bed time around 9. Averaging around 4-5 hours of day sleep. When he takes good naps, he wakes at least 2 times a night (I’m not complaining, just sharing info).

Well the past 2 days we’ve been on the go, super busy, etc and he only got 2-3 hours of day sleep in and he slept through the night 9-6! Only waking once!

My question is, is that too little of day sleep? He’s a little crankier obviously but if he sleeps through the night should I just keep his sleep less? Thanks!