Every September it happens on schedule. The meltdowns, the nap resistance, the children who seem fine at drop-off and fall apart by noon. This isn't just adjustment. There's a clear physiological explanation, and it follows a predictable arc. Here's what educators are actually seeing, and why.

As summer approaches, early childhood programs start seeing it: children who were regulated and rested suddenly struggling with transitions, resisting naps, melting down over small things. That's exactly the problem: it doesn't always look like tiredness. When children accumulate sleep debt, the body releases cortisol to compensate. That stress hormone masks fatigue and produces a child who appears wired, oppositional, or emotionally volatile. Early childhood educators are of