IDES

ides (Idz), n.[fr. Latin idus] (pl.) Roman law. In the Roman calendar, the ninth day after the Nones, being the 15th of March, May, July, and October, and the 13th of the other months. • In the calculation of the day, Nones is the first day counted. Cf. CALENDS; NONES.

[Blacks Law 8th]