1) Babies only start understanding day and night at around 2 months. What you can do is to ensure you show baby that there’s a difference. Keep everything bright and lively during the day, but dark and quiet at night. Baby will slowly learn. It may be frustrating now, but baby’s really scared to be out of your tummy, where there’s not much difference in day and night.. so be patient with baby and offer lots of cuddles:) 2) a good snug swaddle does wonders:) either wrap baby yourself well (watch youtube for tutorials) or you can buy those that can be zipped up.