Over a 30-year period (may 1955 to December 1985), day care surgery was performed on 39,654 patients at the Winnipeg Children's Hospital (WCH). Up to 51% of all pediatric surgical cases and 59% of elective pediatric cases, involving more than 50 different procedures, were performed annually on a day-care basis. The overall incidence of postoperative problems and admission to hospital was 1.5% and 1.1%, respectively. A unique preoperative home visiting program by nurses was demonstrably effective in reducing late cancellations by 75%. The WCH experience adds further evidence that day-care surgery in a pediatric hospital is safe and effective for a large proportion of infants and children requiring operation.