What day is today?

今天周幾？

What day was yesterday?

昨天周幾？

What day will be tomorrow? （這里最容易混淆得就是時態，絕大多數人都會問what day is tomorrow?其實正確得用法是What day will be tomorrow?）

明天周幾？

There are seven days in a week.

一周有七天。

From Monday to Friday are the weekdays.

周一到周五是工作日。

We call Saturday and Sunday the weekend.

周六和周日是周末。

There are 24 hours in a day.

一天有24小時。

hour hand 時針

minute hand 分針

second hand 秒針

One hour is 60 minutes.

一小時是60分鐘。