Why do Sep-Dec translate to 7-10 and where do the other month names originate?

Answer 1

January
Named after the Roman god of beginnings and endings Janus (the month Januarius).

February
The name comes either from the old-Italian god Februus or else from februa, signifying the festivals of purification celebrated in Rome during this month.

March
This is the first month of the Roman year. It is named after the Roman god of war, Mars.

April
Called Aprilis, from aperire, "to open". Possible because it is the month in which the buds begin to open.

May
The third month of the Roman calendar. The name probably comes from Maiesta, the Roman goddess of honor and reverence.

June
The fourth month was named in honor of Juno. However, the name might also come from iuniores (young men; juniors) as opposed to maiores (grown men; majors) for May, the two months being dedicated to young and old men.

July
It was the month in which Julius Caesar was born, and named Julius in his honor in 44 BCE, the year of his assassination. Also called Quintilis (fifth month).

August
Originally this month was called Sextilis (from sextus, "six"), but the name was later changed in honor of the first of the Roman emperors, Augustus (because several fortunate events of his life occurred during this month).

September
The name comes from septem, "seven".

October
The name comes from octo, "eight"

November
The name comes from novem, "nine".

December
The name comes from decem, "ten".

Answer 2

There used to be only 10 months in the year, so September to December were the 7th to 10th months. Julius Caesar and Augustus thought that they were do important that they added 2 more months called July and August which were named after them.

This meant that the 7th month, September was moved along 2 months which it is now the 9th month.

Answer 3

They come from Latin, and meant originally the seventh month, eighth month, ninth month and tenth month. If I remember my schoolboy Latin, 7 8 9 10 is septem, octo, novem, decem. The other months were variously named after Roman gods - January is named after Janus the god of doorways and boundaries because that month stands at the boundary of the year, for example - and deified Roman emperors, July after Julius Caesar and August after Augustus Caesar. Can't help you out on Feb-June though!

Answer 4

September means 7th month, October means 8th month,etc according to the Roman calendar.

January comes from Janus
February means festival
March from Mars god of war
June -Juno
July - Julius Caesar
August - Augustus Caesar

Answer 5

To begin with it was a lunar calendar containing ten months, starting at the vernal equinox, traditionally invented by Romulus, the founder of Rome about 753 BC. However it seems to have been based on the Greek lunar calendar. The months at this time were

Martius (31 days)
Aprilis (30 days)
Maius (31 days)
Iunius (30 days)
Quintilis (31 days)
Sextilis (30 days)
September (30 days)
October (31 days)
November (30 days) and
December (30 days)
Thus the calendar year lasted 304 days and there were about 61 days of winter that did not fall within the calendar.

The first reform of the calendar was attributed to Numa Pompilius, the second of the seven traditional Kings of Rome. He is said to have reduced the 30-day months to 29 days and to have added January (29 days) and February (28 days) to the end of the calendar around 713 BC, and thus brought the length of the calendar year up to 355 days:

Martius (31 days)
Aprilis (29 days)
Maius (31 days)
Iunius (29 days)
Quintilis (31 days)
Sextilis (29 days)
September (29 days)
October (31 days)
November (29 days)
December (29 days)
Ianuarius (29 days)
Februarius (28 days)
In order to keep the calendar year roughly aligned with the solar year, a leap month of 27 days, the Mensis Intercalaris, sometimes also known as Mercedonius or Mercedinus, was added from time to time at the end of February, which was shortened to 23 or 24 days. The resulting year was either 377 or 378 days long. The decision to insert the intercalary month, and its placement, was the responsibility of the pontifex maximus. On average, this happened roughly in alternate years.

The system of aligning the year through intercalary months broke down at least twice. The first time was during and after the Second Punic War. It led to the reform of the Lex Acilia in 191 BC. The details of this reform are unclear, but it appears to have successfully regulated intercalation for over a century. The second breakdown was in the middle of the first century BC. This breakdown may have been related to the increasingly chaotic and adversarial nature of Roman politics at the time. The position of pontifex maximus was not a full-time job; it was held by a member of the Roman elite, who would almost invariably be involved in the machinations of Roman politics. Because a Roman calendar year defined the term of office of elected Roman magistrates, a pontifex maximus would have reason to lengthen a year in which he or his allies were in power, or to not lengthen a year in which his political opponents held office. It was only after Julius Caesar, who had been pontifex maximus for some years, seized absolute power that the calendar was overhauled, with the result being the Julian calendar.

The Romans later renamed months after Julius Caesar and Augustus, renaming Quintilis (originally, "the Fifth month", with March = month 1) as Iulius (July) in 44 BC and Sextilis ("Sixth month") as Augustus (August) in 8 BC. (Note that the letter J was not invented until the 16th century). Quintilis was renamed to honour Caesar because it was the month of his birth. According to a senatus consultum quoted by Macrobius, Sextilis was renamed to honour Augustus because several of the most significant events in his rise to power, culminating in the fall of Alexandria, fell in that month.