March (Mar.) is the third month of the year in the Gregorian calendar, coming between February and April. It has 31 days. March is named after Mars, the Roman god of war. March always begins on the same day of the week as November, and additionally, February in common years.

February

 

💙💛

January

 

Winter

 

 

November is the eleventh and penultimate month of the year in the Julian and Gregorian Calendars. Its length is 30 days. November was the ninth month of the calendar of Romulus c. 750 BC. November retained its name (from the Latin novem meaning "nine") when January and February were added to the Roman calendar. November is a month of late spring in the Southern Hemisphere and late autumn in the Northern Hemisphere. Therefore, November in the Southern Hemisphere is the seasonal equivalent of May in the Northern Hemisphere and vice versa. In Ancient Rome, Ludi Plebeii was held from November 4–17, Epulum Jovis was held on November 13 and Brumalia celebrations began on November 24. These dates do not correspond to the modern Gregorian calendar.

 

From Middle English, borrowed from Old French octobre, from Latin octōber (“eighth month”), from Latin octō (“eight”), from Proto-Indo-European *oḱtṓw (“twice four”); + Latin -ber, from -bris, an adjectival suffix; October was the eighth month in the Roman calendar.

October (plural Octobers)

1. The tenth month of the Gregorian calendar, following September and preceding November. Abbreviation: Oct.
2. (rare) A female given name from English. 

September

 September is the ninth month of the year in both the Gregorian calendar and the less commonly used Julian calendar. In modern day, September has 30 days. September in the Northern Hemisphere and March in the Southern Hemisphere are seasonally equivalent.

In the Northern hemisphere, the beginning of the meteorological autumn is on 1 September. In the Southern hemisphere, the beginning of the meteorological spring is on 1 September.^[1]　

September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church. It is the start of the academic year in many countries of the northern hemisphere, in which children go back to school after the summer break, sometimes on the first day of the month.

September (from Latin septem, "seven") was originally the seventh of ten months in the oldest known Roman calendar, the calendar of Romulus c. 750 BC, with March (Latin Martius) the first month of the year until perhaps as late as 451 BC.^[2] After the calendar reform that added January and February to the beginning of the year, September became the ninth month but retained its name. It had 29 days until the Julian reform, which added a day.