[n] the first month of the year; begins 10 days after the winter solstice
\Jan"u*a*ry\, n. [L. Januarius, fr. Janus an old Latin deity, the god of the sun and the year, to whom the month of January was sacred; cf. janua a door, Skr. y[=a] to go.] The first month of the year, containing thirty-one days. Note: Before the adoption of New Style, the commencement of the year was usually reckoned from March 25.