My baby cries every evening around 6pm and I get so frustrated because that's when I need to make dinner and I can't make her understand schedules.
More people experience this than they realize.
The parent is expecting a pre-verbal child to conform to adult time constructs instead of adapting to natural rhythms.
“Where Are You with Children and time — how they experience it?”
If this sounds familiar, the Library can help you find the bigger picture.