Some 47 years later, with the new term about to start, she will escort children across the road to Osbaldwick Infant School for the last time.
The longest-serving member of the city’s school crossing patrol service said she had enjoyed “every minute” of her job.
“I don’t remember all the children’s names, but I remember all their faces. I’ve helped three generations over the years. Some of the children are now 50 years old,” Ms Horn said.
“You got invited into the school and were part of the community. You knew all the children and all the parents.”
She and three other patrol officers have worked a total of 141 years outside York’s schools, but the council now has vacancies. The job pays £8.70 an hour for between five and 10 hours a week, with school holidays off.
Ms Horn said she would spend her retirement with her eight grandchildren, and by volunteering.
“I’m not one to sit still,” she said.