Many families start daycare during the second year of life, when parents return to work after parental leave. The 12–18 month age range presents particular developmental challenges for the transition. Understanding these helps parents and carers support the child more effectively.
Healthbooq supports families through childcare transitions at every stage.
Why This Age Is Particularly Sensitive
The 12–18 month period coincides with a peak in attachment behaviours and separation anxiety. This is not a pathology — it is a sign of healthy attachment development. The child has developed a strong attachment to primary carers, understands that people continue to exist when not present (object permanence, from around 8–9 months), and is now very aware of the parent's absence.
At this age, the child also:
- Does not yet have language to understand explanations ("I'll be back at 4 o'clock")
- Cannot predict the future based on past experience ("yesterday you came back, so you will come back today")
- Cannot self-regulate distress without co-regulation with a known adult
- Is in a phase of rapid developmental change (walking, language beginning, increased independence alongside increased dependence)
The combination of heightened attachment sensitivity and limited cognitive tools to manage it means this is developmentally a demanding time to start daycare.
What This Means in Practice
The settling-in process matters more at this age. A gradual settling-in — beginning with parent present, then short separations that extend slowly — allows the child to build trust with the key person before being fully left. Rushing this process creates unnecessary distress and prolongs the overall adaptation.
The key person relationship is critical. At 12–18 months, the child's ability to self-regulate depends heavily on being in a trusted adult's presence. The key person needs to become someone the child associates with comfort, responsiveness, and safety — not just organisation of the day.
Physical comfort matters more. Children at this age seek physical reassurance — being held, carried, having physical contact. A setting that can offer this responsively will support adaptation much better than one that keeps children in chairs or on mats.
Realistic Expectations for Adaptation
Adaptation at this age typically takes longer than at older ages. A settling-in period of four to six weeks — with some children needing longer — is normal. The child may protest at drop-off for several weeks even after they are generally adapting well. This is not evidence that daycare is wrong for the child; it is the expected expression of attachment.
Signs that adaptation is progressing despite daily protests: the child settles relatively quickly after the parent leaves; the child eats and sleeps at the setting; the child engages with play and with the key person during the day.
Key Takeaways
The 12–18 month age range is developmentally one of the most challenging for starting daycare. Separation anxiety peaks during this period, and children at this stage do not yet have the language to process what is happening or what to expect. This does not mean daycare should be avoided — but it means the settling-in process is particularly important and should be unhurried. The key person relationship is especially critical at this age.
