3 sentences

1. 星期天不是我的工作日。

   Xīng​qī​tiān bù shì wǒ de gōng​zuò​rì.

   Sunday is not a workday for me.

   Source: Tatoeba

2. 一个星期有六天工作日吗？

   yī gè xīng​qī yǒu liù tiān gōng​zuò​rì ma?

   Are there six working days in a week?

   Source: Dong Chinese Dictionary

3. 快递将在三个工作日内送达。

   kuài​dì jiāng zài sān gè gōng​zuò​rì nèi sòng​dá.

   The package will be delivered within three business days.

   Source: Dong Chinese Dictionary