Ideal Sleeping Time Need for Newborn BabySleeping style of newborn babies is different in all babies, but generally newborn babies sleep well during day and night if they are in good health. Some parents get troubled due to their newborn baby awake in night and not sleep well like other newborn babies. Sleeping habits of newborns are not similar, generally a newborn baby sleep for 17 – 20 hours [including day and night sleeping hours] in a day. Some babies with less sleeping habits sleep for only 11 hours including day and night sleeping hours. Some baby cry in night as crying is the only communication way that your baby knows. Therefore, you need to understand reasons for your baby’s crying by observing her habits for feeding, sleeping, awaking or changing diaper.