January n. : The first month of the year, containing thirty-one days.

Example:
Is there more work in January start courses ?

Taxonomy
January 1, free encyclopedia, Search, month of the year, floral emblem, Articles with unsourced statements, first month, History, designation, northern England, Roman calendar, Scotland, ogg, Gregorian calendars, first day, day of the month, the Northern Hemisphere, Southern Hemisphere.

Defination from the web:
January (pronunciation) (help·info) is the first month of the year in the Julian and Gregorian calendars, and one of seven Gregorian months with the length of 31 days. ... two consuls, who entered office on May 1 and March 15 before 153 BC when they began to enter office on January 1. ...