How long can your 3 month olds stay awake? ds is 14 weeks today, sleeping well at night usually from 7pm to 6.30am with one short wake up for a feed. I've always worked on 1-1.5 hours awake time as he's always sleep. Now when I put him down after 1.5 most of the time he goes bonkers until I get him out so clearly isn't ready. I think I'm starting to miss his window- is 2 hours more appropriate at this age? Dd was a very sleepy baby so not a good guide