mid ‧ week /ˌmɪdˈwiːk◂ $ ˈmɪdwiːk/ BrE AmE adjective , adverb
[ Word Family: noun : ↑ week , ↑ midweek , ↑ weekly ; adverb : ↑ weekly , ↑ midweek ; adjective : ↑ weekly , ↑ midweek ]
on one of the middle days of the week:
There are often discounts available for midweek travel.
—midweek noun [uncountable] :
The match will be played in midweek.