Īdūs īduum, f
the ides, middle of the month (the fifteenth day of March, May, July, and October; the thirteenth of every other month): res ante Idūs acta sic est; nam haec Idibus mane scripsi: Iduum Martiarum consolatio: Idibus Martiis: ad Id. April. reverti, Cs.: a. d. VII Id. Ian., on the 7th of January, Cs.—Debts and interest were often payable on the ides: omnem redegit Idibus pecuniam, H.: diem pecuniae Idūs Novembrīs esse: octonis referentes Idibus aera, H.