My baby is 9 weeks today and for the past week I’ve been trying to put her to bed and do a bedtime routine at around 7.30. She will fall asleep in my arms and won’t let me put her down but by 11pm, it’s like a switch has been flipped and she will go down really easy. She’ll then sleep till 9/10am (waking for feeds obviously!)
I know about the 4th trimester etc but why is it at 11pm she will suddenly go down? I’m happy for her to go down then as it’s similar bedtime to us, however it’s different if we have plans first thing in the morning and have to get up at 7/8 because she looks exhausted 
Has anyone else experienced this with their little night owl?