You thought you were done with sleep regressions. Your toddler has been sleeping well for months. Then, somewhere around the second birthday, it all falls apart again. The child who was sleeping reliably from 7pm to 6:30am is suddenly waking at midnight, refusing to nap, taking an hour to settle at bedtime, and appearing at your bedside at 5am.
The 24 month sleep regression is real, it is developmentally driven, and it does pass. Here is what is happening and what actually helps.
What Is the 24 Month Sleep Regression?
The 24 month sleep regression (also referred to as the two-year sleep regression) is a period of disrupted sleep that typically occurs around the second birthday, though it can begin anywhere between 22 and 26 months for different children.
Unlike earlier regressions that are primarily driven by neurological development, the two-year regression is the result of several things happening simultaneously.
Language Development
The period around 24 months is one of the most significant language development windows in early childhood. Many children experience a vocabulary explosion, moving from individual words to multi-word sentences in a matter of weeks. This rapid development keeps the brain highly active and can disrupt the ability to wind down for sleep.
Growing Independence and Autonomy
The second year is when children begin to understand that they are a separate person from their caregivers, with their own desires and the ability to assert them. Bedtime becomes a natural arena for this assertion. “No” is often a two-year-old’s most practised word, and it is applied freely to sleep.
Separation Anxiety Resurging
Separation anxiety often resurges around 18 to 24 months, even in children who seemed to have moved through earlier separation challenges smoothly. A toddler who was happy to be left in their cot six months ago may now find the separation at bedtime genuinely distressing.
Transitioning Away From the Nap
Around 24 months, many toddlers are approaching the age at which they are ready to drop the afternoon nap, usually happening between 2.5 and 3.5 years. In the lead-up to this transition, the nap itself can become disrupted. A toddler who is not tired enough for a nap but still needs one creates a daytime sleep challenge that ripples into the night.
New Cognitive Awareness
At around two, toddlers develop a more sophisticated understanding of the world, including a growing awareness of things that are scary or uncertain. Nighttime fears can begin to emerge at this age, with some children becoming afraid of the dark or of being alone for the first time.
Signs of the 24 Month Sleep Regression
- Sudden difficulty settling at bedtime after a period of easy settling
- Increased night waking in a child who was sleeping through
- Early morning waking before 6am
- Nap resistance or nap refusal
- Climbing out of the cot (often prompting the cot to bed transition)
- Calling out, crying or appearing at the door repeatedly after being put down
- Increased clinginess and separation distress at bedtime
How Long Does the 24 Month Sleep Regression Last?
Most families experience the 24 month regression for two to six weeks before sleep begins to stabilise again. Some children move through it in less than two weeks. Others take closer to two months, particularly if the regression coincides with other changes such as a house move, a new sibling, starting nursery, or the nap transition.
What to Do During the 24 Month Sleep Regression
Keep the Bedtime Routine Consistent
A predictable routine is the most powerful settling tool available for a toddler at any time, and particularly during a regression. The same sequence of events each evening (bath, pyjamas, teeth, book, song, into bed) signals to the nervous system that sleep is expected.
The toddler may fight the routine. Do it anyway. Predictability reduces anxiety even when the child is loudly objecting to the whole process.
Acknowledge the Regression Without Reinforcing It
There is a meaningful difference between acknowledging that bedtime is hard right now (“I know it feels hard to say goodnight. I love you and I will be here in the morning”) and reinforcing new patterns that will be difficult to undo (staying until the child falls asleep, taking the child into your bed, starting night feeds that had been dropped).
Being warm, present and consistent while maintaining the boundaries that existed before the regression is the goal. This is easier said than done at midnight when you are exhausted.
Address Separation Anxiety Directly
If separation anxiety is driving the regression, there are specific approaches that help.
Practise short separations during the day, with predictable returns. “I am going to put the washing on and I will be back before you finish your snack.” Each successful separation builds the toddler’s confidence that you will return.
Use a transitional object. A comfort toy, a piece of your clothing with your scent on it, or a special toy kept only for sleep can provide physical connection during the separation.
Use a consistent goodbye ritual at bedtime. The same words, the same physical affection, the same sequence. Predictability at the moment of separation significantly reduces distress.
Consider a Nightlight or Glow Clock
If nighttime fears are new, a low-level nightlight makes the bedroom less frightening when the toddler wakes in the night. A glow clock (sometimes called an OK to Wake clock) can also help with early morning waking: the clock changes colour at a set time, and the toddler learns to stay in bed until the colour changes.
Review the Nap
At 24 months, the nap is usually still needed, but it may need adjustment.
If the nap is too long or too late, it can push bedtime too far. Capping the nap at 90 minutes and ensuring it ends by 3pm preserves enough sleep pressure for a reasonable bedtime.
If the toddler is resisting the nap entirely, a quiet rest time (lying on the bed with books or quiet toys, in a dark room, for 45 to 60 minutes) often results in the child falling asleep anyway. Even when it does not, the rest time provides a sensory break that improves the rest of the afternoon.
Manage Your Own Expectations
The two-year regression comes at a point in parenthood when you have probably forgotten how difficult sustained sleep deprivation feels. Give yourself permission to find it hard. Prioritising your own rest during the day when possible, accepting help where it is offered, and remembering that this is temporary are all legitimate strategies.
The Cot to Bed Transition and the 24 Month Regression
Many families face the cot to bed transition around this age, sometimes prompted by the toddler climbing out of the cot. It is worth knowing that transitioning from the cot to a bed during a regression often extends and intensifies the regression, because the new freedom of a bed removes the physical boundary that helped contain the settling.
If possible, delay the cot to bed transition until after the regression has settled. If your toddler is climbing out of the cot and the safety risk is real, the transition may be unavoidable, but going in with realistic expectations about the additional settling challenges it will create is helpful.
When to Seek Support
Most 24 month sleep challenges are developmentally normal and resolve with consistent management. Consider speaking to your health visitor or GP if:
- The regression has lasted more than six weeks with no improvement
- Your toddler is significantly underslept (consistently sleeping fewer than 11 hours in 24 hours)
- Night waking is accompanied by signs of illness, pain, breathing difficulties or symptoms that concern you
- The impact on parental mental health is significant