Most babies do best with a bedtime between 6:00 and 8:00 PM, depending on their age, nap schedule, and when they last woke up. Newborns under two months don’t follow a set bedtime at all, since they sleep in short bursts around the clock. But once a baby reaches about three months old, a consistent evening bedtime becomes both possible and beneficial.
Why Newborns Don’t Have a Bedtime
Newborns sleep 16 to 17 hours a day, but they do it in one- to two-hour stretches scattered across day and night. Their brains haven’t yet developed the internal clock that distinguishes daytime from nighttime. That clock starts ticking around six to seven weeks of age, when a baby’s body begins releasing its own sleep-promoting hormone (melatonin) in response to fading evening light. One study tracking circadian rhythm development found that a measurable day-night pattern emerged by around day 45, especially when infants had regular exposure to natural light and consistent social routines.
Until that shift happens, trying to enforce a fixed bedtime is pointless. Instead, follow your newborn’s cues. Their wake windows are extremely short, just 30 minutes to an hour, so you’ll essentially be putting them down whenever they show signs of drowsiness.
Recommended Bedtimes by Age
Once babies develop a circadian rhythm and start consolidating more of their sleep at night, a regular bedtime matters. Here’s what works for most babies:
- 3 to 4 months: 7:00 to 8:00 PM. Babies this age can stay awake about 1.25 to 2.5 hours between sleep periods. Their last nap often ends around 5:00 or 5:30 PM, making a bedtime near 7:30 a natural fit.
- 5 to 7 months: 6:30 to 7:30 PM. Wake windows stretch to 2 to 4 hours. Many babies drop their third nap during this stage, which can temporarily push bedtime earlier.
- 7 to 10 months: 6:00 to 7:30 PM. With wake windows of 2.5 to 4.5 hours and usually two naps a day, bedtime depends heavily on when that second nap ends.
- 10 to 12 months: 6:30 to 8:00 PM. Some babies transition to one nap near the end of this range, which can shift bedtime slightly later. Wake windows run 3 to 6 hours.
These are ranges, not rules. The right bedtime for your baby is the one that lines up with when they actually get sleepy, given their last nap and how long they can comfortably stay awake.
How to Find Your Baby’s Sleep Window
The “right” bedtime is less about the clock and more about catching the window when your baby’s body is ready for sleep. Miss it, and things get harder. When babies stay awake too long, their bodies release cortisol and adrenaline to compensate for the fatigue. That hormonal surge makes them wired instead of sleepy, which is why an overtired baby often seems hyper or inconsolable rather than drowsy.
Watch for early tired cues: yawning, rubbing eyes, turning away from stimulation, or staring blankly. These mean the sleep window is open. If your baby starts crying frantically, sweating, or becoming unusually hyperactive, you’ve likely missed it. Sweating in particular is a sign that cortisol levels have spiked. At that point, getting them to sleep takes longer and the sleep itself tends to be more fragmented.
A practical way to dial in bedtime: note when your baby’s last nap ends, then add the wake window for their age. If your seven-month-old wakes from their afternoon nap at 3:30 PM and handles about three hours of awake time, aim for a 6:30 PM bedtime. Adjust based on how easily they fall asleep. If it takes more than 20 minutes, try shifting bedtime 15 minutes earlier or later for a few nights.
Why Earlier Bedtimes Often Work Better
Parents sometimes worry that putting a baby down at 6:30 or 7:00 PM will mean a 4:00 AM wake-up. In practice, the opposite tends to happen. A randomized controlled trial found that infants whose parents received early sleep education slept about 89 more minutes at night and woke fewer times compared to a control group. The babies in the intervention group woke an average of 1.9 times per night, versus 2.1 times for the others, and their total nighttime waking time was significantly shorter: about 61 minutes versus 90 minutes.
The biology supports this. Cortisol, the body’s alerting hormone, naturally drops across the evening and reaches its lowest point overnight before rising again toward morning. When babies go to bed within their natural sleep window, they ride that downward cortisol slope into deep sleep. Pushing bedtime later disrupts this pattern, and babies who are overtired at bedtime often show cortisol levels that keep climbing through the night rather than falling. That translates to more night wakings and shorter sleep overall.
Building a Bedtime Routine
A consistent pre-sleep routine signals to your baby’s brain that sleep is coming. Keep it between 20 and 30 minutes. Longer than that and you risk pushing past the sleep window; shorter and the transition from active to calm may feel too abrupt. A bath, a quiet song, dimmed lights, and a book are common elements. The specific activities matter less than the consistency. Doing the same things in the same order every night builds a powerful association between the routine and sleep.
Start the routine in a brighter area of your home and move toward the darker, quieter sleep space. This mimics the natural light transition that triggers melatonin production. Avoid screens and stimulating play in the 30 minutes before bed. By three to four months, most babies respond noticeably to a routine, becoming calmer and drowsier as they recognize the pattern.
Setting Up the Sleep Space
Whatever time you choose for bedtime, the sleep environment matters. Use a firm, flat mattress in a safety-approved crib or bassinet with only a fitted sheet. Keep blankets, pillows, bumper pads, and stuffed animals out of the sleep area. Don’t cover your baby’s head or let them get too warm. The CDC recommends keeping your baby’s sleep space in the same room where you sleep for at least the first six months.
Room temperature between 68 and 72°F works well for most babies. A dark room helps reinforce the circadian signals that make bedtime stick. If you need a nightlight for feeding, use a dim red or amber one rather than white or blue light, which suppresses melatonin.
When Bedtime Keeps Shifting
Expect bedtime to change several times during the first year. Every nap transition, whether from four naps to three, three to two, or two to one, temporarily disrupts the schedule. During these transitions, bedtime may need to move 30 to 60 minutes earlier for a week or two while your baby adjusts to longer wake windows.
Growth spurts, illness, and travel can also throw things off. The fix is usually the same: go back to watching tired cues rather than rigidly following the clock, and return to your normal routine as soon as possible. Most babies resettle into their pattern within a few days. The bedtime itself is less important than its consistency. A baby who goes to bed at 7:15 every night will generally sleep better than one who alternates between 6:30 and 8:30, even if 7:15 isn’t the “perfect” time on paper.