Kalendae (Cal-; v. the letter K), ārum, f. root kal-, cal-; Gr. καλέω; Lat. calāre, clamo; cf. Varr. L. L. 6, § 27 Mull.; prop., the day when the order of days was proclaimed; hence, the Calends, the first day of the month: primi dies nominati Kalendae, ab eo quod his diebus calantur ejus mensis nonae a pontificibus, quintanae an septimanae sint futurae, Varr. L. L. l. l.; Macr. S. 1, 15: sed heus tu, ecquid vides Kalendas venire, Antonium non venire? Cic. Att. 2, 2, 3: litteras accepi datas pridie Kalendas Maias, on the last day of April, id. ib. 13, 20, 1.

—Interest was due on the first day of each month; hence: tristes Kalendae, Hor. S. 1, 3, 87: celeres, Ov. R. Am. 561.

—This reckoning of time was Roman only; hence: Kalendae Ausoniae, Ov. F. 1, 55.

—Prov.: ad Kalendas Graecas solvere, i. e. never, August. ap. Suet. Aug. 87.

— The Kalends were sacred to Juno, Ov. F. 1, 55; Macr. S. 1, 15; hence the first day of the year, Kalendae Martiae, was celebrated as a festival of married women, the Matronalia: dabat, sicut Saturnalibus viris apophoreta, ita per Kalendas Martias feminis, Suet. Vesp. 19: Martiis caelebs quid agam Kalendis, Hor. C. 3, 8, 1: scis certe, puto, vestra jam venire Saturnalia, Martias Kalendas, Mart. 5, 84, 10; Dig. 24, 1, 31, § 8; hence: femineae Kalendae = Kal. Mart., Juv. 9, 53: Kalendae Sextae, the Calends of June, Ov. F. 6, 181: Kalendae Germanicae, the Calends of September, Inscr. Orell. 4949 (cf.: in memoriam patris Septembrem mensem Germanicum appellavit, Suet. Calig. 15): Kalendae Januariae primae, of next January, Cato, R. R. 147 sq.; Inscr. Orell. 3121.

— Transf., a month: nec totidem veteres, quot nunc, habuere Kalendas, Ov. F. 3, 99: intra septimas Kalendas, Mart. 1, 100, 6; 10, 75, 7; Dig. 45, 1, 46.