Workday (noun)

1. A day on which one is normally required to work.
2. A day of the week on which one typically works.
3. A day on which one is occupied with work, as opposed to leisure or rest.

Origin:

Workday is a noun from work + day.

Examples:

1. He usually arrives at the office early on workdays.
2. The company has a strict policy on punctuality for workdays.
3. She usually takes a break during lunch time on workdays.
4. Workdays were long and tiring for him.
5. He often worked on Saturdays and Sundays, as well as on regular workdays.