4 Month Sleep Schedule
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Time to read 10 min
Table of Contents
What does a 4 month sleep schedule look like? Routines with your 4 month old What does a 4 month old’s sleep schedule look like? What does a 4 month old’s feeding schedule look like? What developmental milestones should I keep an eye out for at 4 months? What’s most important to remember for my 4 month old? More detailed routines Frequently asked questions Shop the post Related content
What does a 4 month old sleep schedule look like?
Four months marks the start of the 4-6 month schedule. During this month, your baby is getting more mobile, starting solids (hello peas on the floor!) and having full blown conversations with you. They want to be part of the action and not want to miss out on any fun but stick to the tenets of the Moms on Call routine and you’ll all enjoy this next chapter of their first year.
Somewhere along the way, someone probably warned you about the 4-month sleep regression. Maybe it was a friend, maybe it was your phone at 2am while you were doom-scrolling parenting forums. Either way, we want you to hear this from us first: at Moms on Call, we don't call it a regression. We call it a developmental breakthrough because that's exactly what it is. Here's what's actually happening during your baby’s 4th month. New skills are coming online all at once, rolling, reaching, laughing, babbling, and their sleep cycles are maturing. All of that is exciting. Some of it briefly disrupts sleep. And with the routine you've already built, you will move through it faster than you think. Weeks 17 through 20 are packed with some of the most fun milestones of the entire first year, plus one well-known curveball you are more prepared for than you realize. This post covers what to expect across sleep, feeding, development and key reminders. The full schedule details that bring it all together are in the Moms on Call Basic Baby Care Book and our online courses aka your two best tools for the month ahead.
Four Month Old Sleep Schedule: Stepping up to the next routine with Moms on Call
What does a 4 month old’s sleep schedule look like?
The headline for month four is the developmental breakthrough and we want you to hear it from us before the internet scares you about it.
Around 4 months, your baby's brain undergoes a significant leap. New skills are developing, awareness of the world is expanding and sleep cycles mature to more closely resemble an adult's. All of that is genuinely exciting news AND it also means that a baby who was sleeping beautifully may suddenly start waking more frequently for a bit. Their brain is waking up in new areas. It is completely normal and,with the Moms on Call routine in place, you can move through this breakthrough in as little as 2–3 days.
Here is exactly what to do:
Keep the routine and sleep environment completely intact. This is not the time to introduce changes. Dark room, sound machine, footed pajamas, 68–72°F: everything stays the same. Consistency is what tells your baby's body that nighttime is for sleeping.
Decrease nighttime stimulation. When your baby stirs at night, the best response is to give them space to settle. As long as baby is healthy (you might be battling some colds here and there), give them a few minutes before starting soothing rounds. (Not sure about soothing rounds? Check out the book or 0-6 month course for the details). Your baby is safe, loved and capable of finding their way back to sleep. Going in and stimulating them makes the reset take longer.
Do not make up for lost nighttime sleep by extending daytime naps. Keep the daytime schedule intact. Sunshine, fresh air and active awake time during the day actually support better sleep at night, so lean into both.
Longer playtime. By this month, your baby is ready to stay awake for approximately 2 hours from the start of a feeding before being ready for a nap. This is a notable stretch from the previous month and signals that the 4–6 month schedule is right around the corner.
Transitioning to the 4–6 month routine. When your baby is consistently staying awake for about 2 hours from the start of a feeding and is no longer showing hunger cues at the 3-hour mark, it's time to move to the 4–6 month schedule. This transition brings your baby to two solid naps a day. Start the pre-nap routine (diaper change, storytime, snuggles) about 15 minutes before naptime and use your grace periods on either side to ease in smoothly.
Bedtime routine: Aim for 7:00–7:30 PM. Begin the day consistently around 6:45–7:00 AM.
If for any reason the swaddle has not yet come off, now is the time. Your baby needs the freedom to move and find their own comfortable sleeping position.
What does a 4 month old’s feeding schedule look like?
At 4 months, most babies are solidly in the 4–6 month feeding range. That means 4–5 feedings per day, with most babies taking 6–8 ounces per feeding (and an occasional 9-ounce feed is perfectly normal). Feeding sessions are efficient now, typically 12–15 minutes, or up to 20 minutes for breastfed babies. Babies under 12 months still need at least 24 ounces of breast milk or formula daily.
Keep daytime feeds full and focused. Distractions are real at this age since your baby would genuinely rather look around the room than eat so find a calm, low-stimulation spot for feeds when you can. And be patient - talking with parents, laughing at silly siblings and observing the world are all parts of mealtime too!
Solid foods are on the horizon. Most pediatricians recommend introducing solids somewhere between 4 and 6 months, based on readiness cues rather than a fixed date. Signs to watch for:
your baby can sit with support and hold their head steady
they show genuine interest in food (watching you eat, reaching toward the table)
they have lost the tongue-thrust reflex that automatically pushes food out of their mouth.
Your 4-month well visit is the right time to have this conversation with your pediatrician. When you do get the green light, baby foods are an addition to milk feeds, not a replacement for them.
When ready, our baby food introduction calendar makes it easy to know what food to try when! And be sure to read up on the latest research on allergy introduction to minimize chances of food allergies.
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Order the BookWhat developmental milestones should I keep an eye out for at 4 months?
Month four is a big one developmentally. Here is what to look for:
Rolling is happening or about to happen during this month. Many babies this month are rolling confidently in both directions, back to tummy and tummy to back. Never leave your baby unattended on any surface they could roll off of.
Sitting with support is building. Your baby can hold their head steady and bears weight on their legs when held upright, working their way toward independent sitting over the coming months.
Reaching and grabbing has become purposeful. Your baby will reach for toys, your face, your glasses, your hair, everything is fair game and everything goes straight to the mouth. Make sure to keep small toys and objects out of reach.
Full belly laughs are in regular rotation now. Peek-a-boo, silly sounds and exaggerated expressions will get a response every time.
Babbling is getting louder and more complex. Consonant sounds like ba, ma, da are starting to emerge alongside coos and squeals. Have full conversations back. They love it.
Foot discovery. Your baby has found their feet and will spend a surprising amount of time examining them, grabbing them and attempting to put them in their mouth.
Teething signs may begin this month, even if teeth are still weeks or months away. Increased drooling, gnawing on hands and fists and occasional fussiness are all common. Teething rings (keep some in the freezer!) and extra snuggles go a long way.
FOMO is in full effect. Your baby is keenly aware of the world around them and will fight sleep if there is anything interesting happening nearby. A consistent, low-stimulation wind-down routine before naps and bedtime is more important than ever.
What’s most important to remember at this phase?
The first year is full of change and this is no different. Here’s what to keep in mind at this phase!
4-month well visit: Use this appointment to discuss the developmental breakthrough if it's happening, ask about solid food readiness and your pediatrician's recommended timing and confirm your baby's growth is on track. Come with your list since there's a lot to cover. Be sure to make sure you get all of your questions answered and don’t be afraid to ask for some extra time if you need it.
The developmental breakthrough is temporary. If your baby's sleep takes a hit this month, stay the course. Two to three days of consistency is typically all it takes to move through it. Do not overhaul the routine in response to one rough night or even a rough week.
Sunshine and activity are your friends. Time outdoors during playtime, even just 15 minutes of natural light, supports healthy sleep and helps regulate your baby's circadian rhythm.
Start watching for 4–6 month schedule signs. When your baby is staying awake comfortably for about 2 hours from the start of a feeding and isn't showing hunger at the 3-hour mark, it's time to transition. The full schedule details are in the Moms on Call Basic Baby Care Book.
Baby-proof your space. Rolling means your baby is mobile. If you haven't already, now is the time to think about what is within reach on low surfaces, near the changing table and anywhere your baby spends awake time on the floor.
You don't have to navigate this alone. Whether it's the developmental breakthrough, the schedule transition or the introduction of solids, our Certified Moms on Call Consultants are nurses and moms who know exactly what this month feels like and how to help.
Enjoy the giggles and laughs of month 4!
Four months in, and your baby is rolling, laughing and looking at you like you hung the moon. The work you've done with the consistent routine, the solid sleep environment, the full daytime feeds is written all over this kid. Keep going. The 4–6 month schedule is right around the corner and this next chapter is one of the most fun yet.
Check out these blogs for more timely support for your 4 month old baby.
Feeding Guidelines for the First 6 Months
Transitioning to the 4-6 Month Routine without Starting Solids
Favorite Feeding Products for Starting Solids
Baby Food Introduction Calendar
Transitioning to the Next Schedule
4 Month Sleep Schedule FAQ
My baby was sleeping through the night and is suddenly waking again at 4 months. Did I do something wrong?
You did nothing wrong, this is the 4-month developmental breakthrough and it's one of the most common and well-known sleep disruptions in the first year. At Moms on Call, we don't call it a regression because MOC families don't regress. What's happening is genuinely exciting: your baby's brain is developing rapidly, new skills are coming online and their sleep cycles are maturing. Sleep gets interrupted in the process. The good news is that if your routine and sleep environment are already in place, you can move through this breakthrough in as little as 2–3 days. Stay consistent, decrease nighttime stimulation and trust what you've built.
How do I know when it's time to move to the 4–6 month Moms on Call schedule?
Watch for two key signs: your baby is consistently staying awake for about 2 hours from the start of a feeding and they're not showing hunger cues at the 3-hour mark. When both of those are true, your baby is ready to transition. The 4–6 month schedule moves your baby to two naps a day with extended playtime. Use 15-minute grace periods on either side of the listed times as you ease into the new routine. The full schedule with timing details lives in the book.
Is my baby ready for solid foods yet?
Possibly but the answer depends on readiness cues, not just age. Signs to look for: your baby can sit with support and hold their head steady, they show interest in food by watching you eat or reaching toward the table, and they've lost the tongue-thrust reflex that automatically pushes food out. Most pediatricians recommend starting solids somewhere between 4 and 6 months. Your 4-month well visit is the right time to have this conversation. When you do get the green light, remember that solid foods at this stage supplement milk feeds, they don't replace them. Breast milk or formula remains the primary nutrition source throughout the first year.
How much should my 4-month-old be eating?
In the 4–6 month feeding range, most babies are taking 6–8 ounces per feeding (with an occasional 9-ounce feed), 4–5 times per day, with each session lasting about 12–15 minutes or up to 20 minutes for breastfed babies. Babies up to 12 months need at least 24 ounces of breast milk or formula daily. At this age, distractions during feeds are very real. If your baby keeps pulling off or losing focus, try feeding in a calm, low-stimulation environment. A distracted feeder during the day often leads to a hungry baby at night.
My baby is suddenly fighting naps and bedtime. Is something wrong?
Nothing is wrong, this is FOMO in action. At 4 months, your baby is acutely aware of the world around them and genuinely does not want to miss anything. The best response is a consistent, low-stimulation wind-down routine that gives their brain a clear signal that sleep is coming. Keep the pre-nap and bedtime routine the same every time: diaper change, a short story, snuggles, dark room, sound machine. If the developmental breakthrough is also happening simultaneously, stay consistent and give it 2–3 days. Avoid making changes to the routine in response to a few tough days. Consistency is what moves you through it.
Laura Hunter, LPN and Jennifer Walker, RN, BSN
Co-Founders of Moms on Call, Pediatric Nurses and Moms to 8 kids between them, Laura Hunter and Jennifer Walker created Moms on Call to simplify parenting. Through their books, online courses, podcast and content, they help parents everywhere navigate the first four years with confidence and better sleep.
