dzień roboczy in inglese:

Monday is a weekday in most countries.

I work hard on weekdays so I can party like a rock star on the weekends.

Boxing Day, when presents are given to the postman, the milkman, etc., is the first week-day after Christmas.

- where the conversions of amounts denominated in euro shall be made at the average exchange rate of euro announced by the National Bank of Poland as at the first working day of October of the preceding tax year, rounded off to 1,000 zloties;

the hours when a business is open: Our business day is from 8 to 4:30. / a day on which businesses, banks, and stock exchanges are open: If the package is not picked up after five business days, it will be returned to the sender.