week·day 
/ˈwi:kˌdeɪ/ noun
plural week·days /ˈwi:kˌdeɪ/ noun [count] : any day of the week except Saturday and Sunday
▪ The library is open on weekdays from 9:00 to 5:00.
▪ The library is open on weekdays from 9:00 to 5:00.
— week·days /ˈwi:kˌdeɪz/ adverb, chiefly US
▪ We're open weekdays from 9 to 5.
/ˈwi:kˌdeɪz/ adverb, chiefly US ▪ We're open weekdays from 9 to 5.
