work ‧ day /ˈwɜːkdeɪ $ ˈwɜːrk-/ BrE AmE noun [countable] American English
1 . the amount of time that you spend working in a day SYN working day :
a 10-hour workday
2 . a day of the week when most people work SYN working day :
He commutes three hours on workdays.
workday traffic