the amount of time a person spends doing their job on a day when they work

An eight-hour working day is still typical for many people. 很多人通常还是每天工作8小时。

a day on which most people go to work

On a working day I tend to get up around seven o'clock. 在工作日，我通常7点左右起床。

Please allow three full working days for the money to be transferred. 3个工作日后这笔钱才能转过去，请见谅。