January的音标：[英] [ˈdʒænjuəri] [美] [ˈdʒænjuˌɛri]
January is the first month of the year in the Julian and Gregorian calendars and one of seven months with the length of 31 days. The first day of the month is known as New Year's Day.
January (in Latin, Ianuarius) is named after Janus, the god of the doorway; the name has its beginnings in Roman mythology, coming from the Latin word for door (ianua) since January is the door to the year.In ancient Roman religion and mythology, Janus is the god of beginnings and transitions, thence also of gates, doors, doorways, endings and time. He is usually a two-faced god since he looks to the future and the past. The Romans dedicated the month of January to Janus.