星期几的英文是：What day of the week is it?

来源：星期几的英文说法来源于日耳曼语中的 "Wochentag"，意思是一周的一天。

一些例句及其中文翻译：

Today is Tuesday. 今天是星期二。

I'm free on Sunday. 我星期天有空。

What day of the week do you usually do your homework? 你通常在星期几做作业？

I can't meet you on Wednesday because I have a doctor's appointment. 我星期三没办法见你，因为我有医生预约。