Thirty days hath September;
    除了九月有30天
    April,June and November;
    四月，六月，11月有三十天
    All the rest have thirty-one,
    其余的都有31天
    Excepting February alone,
    除了二月
    And that has twenty-eight days clear
    平年二十八天
    And twenty-nine in each leap year.
    閏年二十九天