feria
n 1: a weekday on which no festival or holiday is celebrated; "in
the middle ages feria was used with a prefixed ordinal
number to designate the day of the week, so `secunda
feria' meant Monday, but Sunday and Saturday were always
called by their names, Dominicus and Sabbatum, and so
feria came to mean an ordinary weekday"
2: (in Spanish speaking regions) a local festival or fair,
usually in honor of some patron saint
[also: feriae (pl)]