Teachers' Day为什么Deachers' 和Day都大写,还有为什么teacher'后面还加一个' 呢

为什么教师节是Teachers‘ Day 而父亲节不是Fathers’ Day 为什么把teachers' day的teachers'写成那样,而不写teachers's快要讲清楚,我才13岁 Happy Teachers'Day是什么意思 Happy Teachers‘Day!中文 Happy Teachers'Day! TEACHERS’DAY的汉语 手抄报teachers day teachers day 作文 teachers'Day card. Teachers' Day为什么Deachers' 和Day都大写,还有为什么teacher'后面还加一个' 呢 到底是Teacher's Day 还是 Teachers' Day那 mother's day 还是 mothers' day？为什么呢？ 为什么英语中教师节用Teachers' Day而母亲节却是Mother's Day呢? 为什么教师节是 Teachers' Day 而 母亲节是 Mother's Day 怎么区分’s 和s' 为什么母亲节是Mother‘s Day,而教师节是Teachers’Day? 为什么Mother's day 的mother 是单数而Teachers'day 的teacher 是复数? 为什么The Teachers' Day,是s',Mother's Day是's啊? september 10th is ( ) DayA.Teacher's Day B.Teachers' Day C.the Teachers' Day为什么不选A,说明原因 September 10th is _____________ A.Teacher's Day B.Teachers' Day C.the Teachers' Day 应该选择哪个答案,为什么?