NEFASTUS

nefastus (ni-fas-t[schwa]s), n. [Latin ne “not” + fastus “lawful for public business”] Roman law. A day when it is unlawful to open the courts, administer justice, or hold public assemblies. • The priests in charge of supervising the laws and religious observances established an official calendar, on which certain days, marked “nefasti,” were to be […]