Abstract Objective To explore the impact of school periods and long holiday periods on the occurrence of neurally mediated syncope (NMS) in children. Methods A retrospective analysis was conducted on 262 children with NMS. The children were aged 4–17 years, 119 males. 244 cases were diagnosed as vasovagal syncope, and 18 cases as postural orthostatic tachycardia syndrome. The data on the age, sex, syncope triggers, hemodynamic types, family history of syncope of children with syncope during long holiday periods group (n = 68) and school periods group (n = 194) were compared. Results (1) Incidence of syncope: The incidence of syncope during school periods (74.05%) was higher than that during long holiday periods (25.95%). (2) Comparison of sex and triggers: The constituent ratio of females with syncope during school periods was higher than that of males (P