Tuesday, November 03, 2026
Parenting

Why babies cry more in the evening: the witching hour explained

Rive News Research Desk

Published · 8 min read

By Rive News / Research desk | Rive News / Published October 24, 2026 at 9:00 AM PKT

Key takeaways

  • Crying peaks around 6 weeks of age, averaging 2-3 hours a day, and clusters in the evening for most babies.
  • The leading explanation is nervous-system overload: a full day of input with no way to vent it except crying.
  • It eases by 10-12 weeks for most babies and is largely gone by 4 months.
A newborn baby crying, illustrating the evening fussiness known as the witching hour
A newborn baby crying, illustrating the evening fussiness known as the witching hour

[A newborn baby crying. Photograph: crying infant]

Image Credits: Wikimedia Commons

The witching hour is the stretch of late-afternoon and evening fussiness that hits most newborns daily, typically between 5 PM and 11 PM. The baby cries hard, resists soothing, and looks like something is wrong, though usually nothing is.

Despite the name, it rarely lasts just an hour. For many families it runs two to four hours, night after night, which is why researchers gave it a clinical name too: the period of PURPLE crying.

This article explains why babies cry more in the evening, including what the witching hour actually is, the overstimulation theory, the role of the unfinished circadian clock, and what genuinely helps parents get through it.

This article is for general information only and is not medical advice; talk to a clinician about any symptoms.

What the witching hour is

Pediatric researchers describe a consistent curve. Crying increases from birth, peaks around 6 weeks, then declines. At that peak, a healthy, well-fed baby averages 2 to 3 hours of crying a day, and evening is when most of it lands, according to Babynama's review of the cross-cultural research.

The pattern is strikingly universal. It shows up in high-income and low-income countries, in cultures where babies are carried constantly and in cultures where they are not. That universality is a clue that the cause is developmental, not parental.

Ronald Barr, a developmental pediatrician and leading infant-crying researcher, created the PURPLE acronym to capture the pattern.

It stands for Peak of crying, Unexpected timing, Resists soothing, Pain-like face without actual pain, Long-lasting bouts, and Evening clustering. The evening letter is the one parents feel most.

About half of babies show their biggest crying cluster in the evening, while roughly 21 percent peak in the afternoon, according to the Secrets of Baby Behavior research summary. Either way, the late-day bias is the norm, not the exception.

Colic sits at the extreme end of the same curve. The classic definition is more than 3 hours of crying per day, more than 3 days per week, for more than 3 weeks. It affects an estimated 10 to 40 percent of babies and typically resolves by 3 to 4 months without treatment, per the same Babynama review.

Why evenings are the worst: the overstimulation theory

The leading explanation is beautifully simple. A newborn nervous system spends all day absorbing light, noise, movement, faces, and smells. By late afternoon, the system is over budget.

Newborns cannot process or filter input the way older children do. They take everything in and have only one output channel for the surplus. As the NewBond pediatric guide puts it, the baby vents the day's surplus the only way it can: loudly.

This is not just a metaphor. Evening fussiness lines up with the household's noisiest hours: people coming home, dinner prep, television, siblings.

The Secrets of Baby Behavior site notes that this stimulation overload at day's end is exactly when many babies hit their limit. Even sustained eye contact can overstimulate a very young infant.

Cluster feeding adds fuel. Many babies feed far more often in the evening, tanking up before the night.

A baby who feeds, fusses, feeds again, and still cries is often doing two things at once: eating and venting. The feeding looks frantic because the nervous system is frantic.

Digestive discomfort plays a supporting role. A newborn's gut is still maturing, and swallowed air accumulates through the day. Gas and bloating tend to announce themselves in the evening, which is why burping and upright holding sometimes help even when the root cause is neurological, not gastrointestinal.

The circadian angle: an unfinished body clock

There is a second, quieter mechanism: the baby's body clock is not finished yet. Circadian rhythms take weeks to establish, and in the meantime the transition from day to night genuinely confuses a newborn.

Adults run on a cortisol rhythm that rises in the morning and falls at night. In excessively crying infants, researchers have found a blunted version of that daily rhythm. A study reviewed in PMC found that 20 excessively crying infants showed a flatter diurnal cortisol pattern than 20 controls, a pattern generally associated with poorer stress regulation.

Cortisol is not the villain of this story. It rises and falls naturally as part of the circadian rhythm, and babies habituate to everyday stressors like baths within days. But the research suggests that the stress-response system and the evening crying peak are wired into the same immature circuitry.

Light matters here too. Bright days and dim evenings help entrain the developing clock, which is one reason sleep consultants recommend daylight exposure in the morning. The clock cannot settle while the baby's world has no reliable contrast between day and night.

None of this means the crying is "caused by cortisol" in any simple sense. It means the evening peak is what an unfinished nervous system looks like from the outside: a stress response with the volume stuck high until the wiring matures.

A newborn baby sleeping peacefully in a basket, the calm that follows the evening storm
A newborn baby sleeping peacefully in a basket, the calm that follows the evening storm

[A newborn baby sleeping in a basket. Photograph: sleeping newborn]

Image Credits: Wikimedia Commons

What actually helps, and what does not

First, the timeline itself helps. The witching hour usually appears at 2 to 3 weeks, peaks at 6 weeks, eases by 10 to 12 weeks, and is mostly gone by 16 weeks, according to the NewBond guide.

If you are at week 8, you are on the downslope. Marking a calendar genuinely helps morale.

Reduce input before the peak hour. Dim the lights, lower the noise, and keep visitors away in the late afternoon.

This is the opposite of what many parents try, which is to entertain the baby out of the fussiness. Less in means less to vent.

Motion and contact work better than stimulation. Walking, rocking, babywearing, and skin-to-skin contact give the nervous system rhythmic input instead of chaotic input. A dark room with white noise is a classic for a reason: it is the sensory equivalent of turning everything down.

Feed on demand through the evening without watching the clock. If the baby wants to cluster feed, let them. Restricting feeds to "fix" the schedule usually adds hunger crying on top of the developmental crying, and nobody needs both.

What does not help: bouncing between five soothing methods in ten minutes. Rapid switching adds novelty, and novelty is input. Pick one calm strategy and give it fifteen minutes before judging it.

Watch for the red flags that mean "call the pediatrician," not "wait it out": fever, vomiting, poor feeding, unusual lethargy, or crying that suddenly changes character. Trust the pattern break more than the volume.

As the baby grows, the same sensory curiosity that drives evening meltdowns becomes fascination. The stage when babies stare at ceiling fans and lights for no apparent reason is the same visual system learning to lock onto the world. Later, when toddlers throw tantrums in public, the trigger shifts from overload to thwarted will, but the job is similar: stay calm, reduce input, wait.

A crying newborn held close, showing the clinginess that peaks during evening fussiness
A crying newborn held close, showing the clinginess that peaks during evening fussiness

[A crying newborn baby. Photograph: newborn infant crying]

Image Credits: Wikimedia Commons

When does the witching hour start and end?

It usually starts between 2 and 4 weeks of age, peaks around 6 to 8 weeks, and fades between 3 and 4 months. Pediatrician Luke Voytas gives a similar window: starting near two weeks, peaking at six to eight weeks, and usually disappearing by three to five months.

Is evening crying a sign of colic or reflux?

Not necessarily. Most evening fussiness is developmental and follows the normal crying curve.

Colic is the extreme end, defined by the rule of threes, and reflux involves spitting up with distress. When in doubt, describe the pattern to your pediatrician rather than diagnosing from a checklist.

Does the witching hour mean my milk supply is low?

Evening fussiness happens in formula-fed babies too, which points to development rather than milk. Supply naturally dips in the evening, and frequent feeding is the baby's way of managing it. If weight gain is on track, the crying is almost certainly not about hunger alone.

Can you prevent the witching hour?

You cannot skip the developmental phase, but you can soften it. Protect late-afternoon naps, keep evenings low-stimulation, and front-load calm into the 4 PM to 6 PM window.

Think of it as lowering the day's total input so the evening vent is smaller.

Outlook

The witching hour is a phase, not a verdict on your parenting. It peaks, it fades, and the baby on the other side sleeps longer and cries less because the nervous system finally learned to file the day away quietly.

It is a good idea to talk to your pediatrician if the crying feels wrong to you, especially if feeding, growth, or sleep are affected. And if the nights are the hard part, planning for weaning off night feedings gently, when the time comes, is easier once the evening storm has passed.

Tags: newborns, crying, witching hour

The Rive News research desk compiles explainers from public sources, including pediatric guides and peer-reviewed summaries, and every factual claim is checked against a named source before publication.

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