It is common for infants to begin consolidating sleep as they approach one month of age. If your baby has regained their birth weight and is feeding well during the day, a longer stretch at night (4-5 hours) may be acceptable, though some pediatricians still recommend waking them every 2-3 hours until a certain weight or age is reached. Always confirm with your pediatrician, especially if there are lingering concerns like jaundice, to ensure they are getting adequate nutrition.