feria.n.01

'feria.n.01'

[feria.n.01] as in: a weekday on which no festival or holiday is celebrated

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Examples:
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