A good bedtime for most kindergarteners falls between 7:00 and 8:00 p.m. The exact time depends on when your child needs to wake up, since children ages 3 to 5 need 10 to 13 hours of sleep per day, and most kindergarteners have dropped their daytime nap. That means nearly all of those hours need to come from nighttime sleep.
Getting this right matters more than you might expect. Children who regularly slept 10 or more hours per night, especially in the year before kindergarten, showed better socioemotional adjustment, stronger learning engagement, and higher academic performance once school started. The consistency of that sleep mattered just as much as the total hours.
How to Calculate Your Child’s Bedtime
Start with your child’s wake-up time and count backward. The national average school start time is 8:13 a.m., which means most kindergarteners need to be up by 7:00 or 7:15 to get dressed, eat breakfast, and get out the door. If your child’s school starts earlier or later, adjust accordingly.
From there, subtract the sleep your child needs. Most five-year-olds do well with 10 to 11 hours, though some need closer to 12. Then add about 15 to 20 minutes, because children this age typically take that long to fall asleep after lights go out. For a child waking at 7:00 a.m. who needs 11 hours of sleep, lights-out should be around 7:40 p.m., which means starting the bedtime routine around 7:00 to 7:15.
Here’s a quick reference:
- Wake-up at 6:30 a.m.: Bedtime between 6:30 and 7:30 p.m.
- Wake-up at 7:00 a.m.: Bedtime between 7:00 and 8:00 p.m.
- Wake-up at 7:30 a.m.: Bedtime between 7:30 and 8:30 p.m.
If your child consistently fights bedtime, takes more than 30 minutes to fall asleep, or wakes up easily on their own in the morning, that’s useful information. Kids who struggle to fall asleep may have a bedtime set too early for their internal clock, while kids who are difficult to wake are likely not getting enough total sleep.
Why Evening Light Matters More Than You Think
Young children are remarkably sensitive to light in the hour before bedtime. A study of preschool-aged children found that even low levels of light exposure in the evening suppressed melatonin (the hormone that signals the body it’s time to sleep) by an average of 85%. That’s not just bright overhead lights or screens. Children exposed to light as dim as 5 to 40 lux, roughly equivalent to a single lamp across the room, still had their melatonin suppressed by about 78%.
Even more striking: for 62% of the children in the study, melatonin levels stayed below half their normal amount for at least 50 minutes after the light exposure ended. So a child who watches a bright tablet at 7:15 p.m. may still have disrupted melatonin production at 8:00 p.m., even with the lights off. This helps explain why some kids seem wired at bedtime despite being clearly tired.
The practical takeaway is to dim your home’s lighting in the 30 to 60 minutes before your child’s bedtime. Turn off overhead lights, switch to a low nightlight, and power down screens. This gives your child’s brain the darkness cue it needs to ramp up melatonin production naturally.
Building a Bedtime Routine That Works
A consistent bedtime routine is one of the most well-supported tools for improving children’s sleep. Studies across 14 countries involving more than 10,000 children found that having a regular routine was linked to earlier bedtimes, faster sleep onset, longer total sleep, fewer nighttime wake-ups, and fewer parent-reported sleep problems. That’s a broad list of benefits from a relatively simple habit.
The routine doesn’t need to be elaborate. A 30-minute sequence of three steps works well: a bath, a calming physical activity like applying lotion or a brief massage, and a quiet activity like reading a book or cuddling. In one controlled trial, families who adopted this kind of routine saw significant improvements in how quickly their children fell asleep within just three weeks. The key is consistency. Doing the same activities in the same order signals to your child’s brain and body that sleep is coming.
What matters most is that the routine is calm and predictable. Roughhousing, exciting games, or negotiating over “five more minutes” all work against the goal. Think of the routine as a gradual transition from the activity of the day to the stillness of sleep.
Most Kindergarteners Don’t Need Naps
By age five, roughly 94% of children have stopped napping. If your kindergartener still naps, that’s not necessarily a problem, but it will push their natural bedtime later. Research consistently shows that napping beyond age two redistributes sleep across the 24-hour day rather than adding to it, meaning a child who naps for an hour in the afternoon will typically fall asleep an hour later at night.
If your child’s school doesn’t include a rest period and they’re getting 10 to 11 hours at night, they likely don’t need a nap. But if they’re routinely falling asleep in the car on the way home from school or melting down by 5:00 p.m., their nighttime sleep may not be sufficient, and an earlier bedtime is a better fix than reintroducing naps.
Signs Your Child Isn’t Sleeping Enough
Sleep deprivation in kindergarteners doesn’t always look like yawning and droopy eyes. In young children, insufficient sleep often shows up as behavioral problems: hyperactivity, impulsivity, difficulty paying attention, increased aggression, and more frequent emotional outbursts. Teachers may report behavior issues that parents attribute to personality or developmental phases, when the underlying cause is a sleep deficit of even 30 to 60 minutes per night.
Persistent sleep problems in this age group are also linked to anxiety and depressed mood. Children with shorter sleep duration score higher on measures of inattention and rule-breaking behavior. And the physical effects are real too: short sleep in early childhood is a consistent predictor of obesity, with preschool-aged children being particularly vulnerable.
If your child is getting less than 10 hours of sleep on most nights and you’re noticing any of these patterns, moving bedtime earlier by even 15 to 30 minutes can make a noticeable difference within a week or two.
Setting Up the Sleep Environment
Keep your child’s bedroom cool, ideally between 60 and 68°F (16 to 20°C). A room that’s too warm disrupts sleep quality even if your child doesn’t fully wake up. Use light bedding or a lightweight blanket appropriate for the temperature, and consider blackout curtains if streetlights or early morning sun are an issue. A room that’s dark, cool, and quiet gives your child the best chance of falling asleep quickly and staying asleep through the night.