五一劳动节倒底是LABOR DAY还是LABOR'S DAY

五一劳动节倒底是LABOR DAY还是LABOR'S DAY 是Labor's Day 还是 Labors' Day? in the labor's day还是on the labor's day正确?为什么? labor day在什么时候 英语翻译Labor's Day is on May 1st.Labor's Day is an internationa on labor's day,on spring festival's day ,on american Labor Day 全文翻译 The History of Labor Day labor day 是劳动节吗? Labor Day 是在什么时候 Labor Day,April'sDay,Christmas Day--------------是什么意思 EASTER Day,LABOR DAY,NURSES'DAY,INDEPENDENEE DAY and THANKSG