Most babies do best with a bedtime between 6:30 and 8:00 p.m., but the ideal time depends on your baby’s age, when their last nap ended, and how long they can comfortably stay awake. Newborns don’t follow a set bedtime at all, while babies older than 3 or 4 months naturally settle into a more predictable evening schedule as their internal body clock develops.
Why Age Changes Everything
Newborns (birth to about 3 months) sleep and wake in short cycles around the clock, logging 11 to 19 hours of total sleep per day with no real distinction between day and night. Setting a firm bedtime during this stage isn’t realistic or necessary. Instead, your newborn will drift in and out of sleep based on feeding needs, and their “bedtime” is simply whenever they fall asleep for their longest stretch.
Around 2 to 3 months, babies begin producing melatonin, the hormone that signals nighttime to the brain. This is the turning point. Once melatonin kicks in, sleep starts consolidating into longer nighttime blocks, and a consistent bedtime begins to matter. By 3 to 6 months, many babies can sleep 6 to 8 hours straight at night, making a regular bedtime between 7:00 and 8:00 p.m. both possible and beneficial.
From 6 to 12 months, babies typically need 10 to 14 hours of nighttime sleep. Most parents find that a bedtime closer to 7:00 p.m. works well at this stage, since babies in this age range usually wake between 6:00 and 7:00 a.m. A baby who consistently wakes at 6:00 a.m. and needs 11 hours of overnight sleep, for example, should be asleep by 7:00 p.m.
How Wake Windows Set Bedtime
Rather than picking a bedtime off a chart, the most reliable approach is working backward from your baby’s last nap. The amount of time your baby can stay awake between sleep periods (called a wake window) grows steadily during the first year:
- Birth to 1 month: 30 to 60 minutes
- 1 to 3 months: 1 to 2 hours
- 3 to 4 months: 1.25 to 2.5 hours
- 5 to 7 months: 2 to 4 hours
- 7 to 10 months: 2.5 to 4.5 hours
- 10 to 12 months: 3 to 6 hours
If your 6-month-old’s last nap ends at 3:30 p.m. and their wake window tops out around 3 hours, bedtime should land near 6:30 p.m. If a 10-month-old finishes their afternoon nap at 2:00 p.m. and handles 4.5 hours awake, you’re looking at a 6:30 p.m. bedtime. The last wake window of the day is typically the longest one, so the gap before bed will be slightly bigger than the gaps between naps.
This is why bedtime can shift from week to week. As your baby drops naps or nap times change, bedtime moves with them. A baby transitioning from three naps to two often needs an earlier bedtime for a few weeks until the new schedule settles in.
What Happens When Bedtime Is Too Late
Keeping a baby up later doesn’t make them sleep later in the morning. It usually does the opposite. When babies stay awake past the point of comfortable tiredness, their bodies release cortisol and adrenaline, stress hormones that create a wired, hyperactive state. This is what pediatric sleep experts call being “overtired,” and it’s one of the most common reasons babies fight bedtime or wake frequently overnight.
Research on infant cortisol levels supports the value of earlier bedtimes. Babies who go to sleep earlier tend to have lower evening cortisol levels, which means they’re calmer and fall asleep more easily. Higher evening cortisol, on the other hand, reflects extended waking hours and can contribute to a cycle of poor sleep. An overtired baby who sleeps poorly builds up more cortisol the next day, making the following bedtime harder too.
You can spot overtiredness in real time. An overtired baby cries louder and more frantically than usual, may start sweating from the cortisol spike, and can seem paradoxically energized. At that point, getting them to sleep takes significantly longer than if you’d caught the earlier window.
Reading Your Baby’s Sleep Cues
Your baby will tell you when they’re ready for bed if you know what to watch for. Early sleepiness looks like yawning, droopy eyelids, staring into the distance, and furrowed brows. Some babies rub their eyes, pull on their ears, or start sucking their fingers. These are your green lights to begin the bedtime routine.
A baby who turns away from toys, voices, or even a bottle or breast is signaling that their brain is shutting down for the day. Disinterest in surroundings is one of the clearest cues. Clinginess comes next, as tired babies instinctively want to be held. If you notice a drawn-out whine that never quite becomes a full cry (sometimes called “grizzling”), your baby is telling you they’ve been awake long enough.
The goal is to start your bedtime routine at the first cluster of these signs, not after they’ve escalated into frantic crying. Once a baby tips into overtired territory, the stress hormones that flood their system make it harder for them to settle, even though they desperately need sleep.
Building a Bedtime Routine
A bedtime routine doesn’t need to be elaborate. For newborns, a simple cycle of feeding, a brief cuddle, and putting them down is enough. At this age, flexibility matters more than consistency. Follow your baby’s lead and don’t worry about a rigid schedule.
For babies older than 3 months, a short, predictable sequence of events helps their brain recognize that sleep is coming. A bath, a feed, a quiet song, and dimmed lights is a classic pattern that works well. The routine itself can be as short as 15 to 20 minutes. What matters is doing the same things in the same order each night, which gives your baby’s body a chance to start winding down before you ever lay them in the crib.
Dimming lights in the hour before bed supports your baby’s natural melatonin production. Bright light, especially from screens, suppresses melatonin and can push sleepiness later. Keeping the house quieter and darker as bedtime approaches reinforces the biological signals already happening in your baby’s brain.
Room Setup for Better Sleep
The recommended room temperature for a sleeping baby is 16 to 20°C (roughly 61 to 68°F). This range feels cooler than most adults expect, but babies sleep more soundly in a slightly cool room than a warm one. Overheating is also a safety concern, so dressing your baby in one layer more than you’d wear comfortably and skipping heavy blankets is the standard approach.
A dark room matters more as babies get older. Newborns aren’t affected much by light or dark, but once melatonin production starts around 2 to 3 months, a dark sleep environment helps signal nighttime. Blackout curtains can be especially useful in summer months when the sun sets well after your baby’s ideal bedtime.
When Bedtime Keeps Shifting
It’s normal for bedtime to move around during the first year. Growth spurts, nap transitions, teething, and developmental leaps all temporarily disrupt sleep patterns. A baby who was happily asleep by 7:00 p.m. for weeks may suddenly resist bedtime or start waking at 5:00 a.m. These phases are usually short-lived.
The most common triggers for a bedtime shift are nap transitions. When your baby drops from three naps to two (typically around 6 to 8 months) or from two naps to one (around 12 to 18 months), the last wake window of the day stretches. During the adjustment period, you may need to move bedtime 30 to 45 minutes earlier to compensate for lost daytime sleep, then gradually push it later as your baby adjusts to the new schedule.
If you’re unsure whether your baby’s bedtime is right, track two things for a week: what time they fall asleep and what time they wake in the morning. A baby who falls asleep within 15 to 20 minutes of being put down, sleeps through most of the night (with age-appropriate feeds), and wakes in a good mood is on a schedule that fits their biology. A baby who takes 45 minutes to fall asleep, wakes repeatedly, or seems cranky in the morning likely needs an earlier bedtime or a schedule adjustment.