13: Parentatio, with appeasement of the Manes beginning at the 6th hour and ceremonies performed by the chief Vestal; temples were closed, no fires burned on altars, marriages were forbidden, magistrates took off their insignia, until the 21st
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Lemures is the more common literary term but even this is rare: it is used by the Augustan poets Horace and Ovid, the latter in his Fasti, the six-book calendar poem on Roman holidays and religious customs.