Feria - Definition
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