Sextilis

Latin > English

Sextilis Sextilis, Sextile ADJ :: August (month/mensis understood); abb. Sext.??; renamed to Julius in 44 BC

Latin > English (Lewis & Short)

Sextīlis: e, adj. sextus,
I sixth, only with mensis, of the month of August: MENSE SEXTILI, S. C. ap. Macr. S. 1, 12 fin.: Sextili menso caminus, Hor. Ep. 1, 11, 19. —Hence, subst.: Sextīlis, is, m. (sc. mensis), the sixth (month); hence, the month of August, acc. to the old Roman reckoning (counting from March), afterwards called Augustus (v. h. v., and cf. Varr. L. L. 6, 4 fin.), Cic. Fam. 10, 26, 1: Sextilem totum mendax desideror, Hor. Ep. 1, 7, 2: Kalendae, of August, Liv. 3, 6; 6, 1 fin.: Nonae, Idus, id. 41, 16.

Wikipedia EN

Sextilis ("sixth") or mensis Sextilis was the Latin name for what was originally the sixth month in the Roman calendar, when March (Martius, "Mars' month") was the first of ten months in the year. After the calendar reform that produced a twelve-month year, Sextilis became the eighth month, but retained its name. It was renamed Augustus (August) in 8 BC in honor of the first Roman emperor, Augustus. Sextilis followed Quinctilis, which was renamed Julius (July) after Julius Caesar, and preceded September (from septem, "seven"), which was originally the seventh month.