childrens day(childrens day前面加on还是at)

childrens day前面加on还是at？childrens day前面加on，以day结尾的节日前用介词on，像在万圣节是at Halloween。还有就是on是具体的某天，而at是泛指某天。

如：The childrens play in the lawn happily on Childrens day.儿童节，孩子们快乐地在草坪上玩耍。