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Who named the 12 months?

Author

Mia Kelly

Published Jan 22, 2026

When Julius Caesar became pontifex maximus, he reformed the Roman calendar so that the 12 months were based on Earth's revolutions around the Sun.

How did the 12 months get their names?

September, October, November and December are named after Roman numbers 7, 8, 9 and 10 – they were originally the seventh, eighth, ninth and tenth months of the Roman year! Before July and August were renamed after Roman rulers, they were called Quintilis and Sextilis, meaning fifth and sixth months.

Who named the 12 months of the year?

Julius Caesar's astronomers explained the need for 12 months in a year and the addition of a leap year to synchronize with the seasons. At the time, there were only ten months in the calendar, while there are just over 12 lunar cycles in a year.

Who gave name to months?

The modern Gregorian calendar has roots in the Roman calendar, specifically the calendar decreed by Julius Caesar. So, the names of the months in English all have Latin roots. Note: The earliest Latin calendar was a 10-month one, beginning with March; thus, September was the seventh month, October, the eighth, etc.

Did Julius Caesar name the months?

1: The Romans originally used a 10-month calendar, but Julius and Augustus Caesar each wanted months named after them, so they added July and August.

32 related questions found

Why is January named January?

According to tradition, during his reign (c. 715–673 BCE) Numa revised the Roman republican calendar so that January replaced March as the first month. It was a fitting choice, since January was named after Janus, the Roman god of all beginnings; March celebrated Mars, the god of war.

Who named July and August?

It was later changed to July by the ruler of Roman world, Julius Caesar, after his family name (Julius). AUGUST: This month was first called Sextillia – the Roman word for “sixth”, as it was the sixth month of the Roman year. It was later changed to August by the Emperor Augustus, and he named it after himself.

Who is April named?

One tradition had it that Romulus named April after the goddess Aphrodite, who was born from the sea's foam (aphros in Ancient Greek). Aphrodite, known as Venus to the Romans, was the mother of Aeneas, who fled from Troy to Italy and founded the Roman race.

Who is February named after?

Where did the word February come from? Since other months, like January, are named after Roman gods, you'd be forgiven for thinking February was named after the Roman god Februus. But, the word February comes from the Roman festival of purification called Februa, during which people were ritually washed.

Why are the months named wrong?

Contrary to popular belief the months of July and August were NOT added, they simply were renamed. The month Quintilis (fifth) became July and, years later, Sextilis (sixth) became August. So January and February are the real culprits for the disparity of the names of the months vs. its position on the year.

Why is August named August?

August, eighth month of the Gregorian calendar. It was named for the first Roman emperor, Augustus Caesar, in 8 bce. Its original name was Sextilus, Latin for “sixth month,” indicating its position in the early Roman calendar.

When did year 1 start?

A monk called Dionysius Exiguus (early sixth century A.D.) invented the dating system most widely used in the Western world. For Dionysius, the birth of Christ represented Year One. He believed that this occurred 753 years after the foundation of Rome.

Where did the month of April get its name?

One is that the name is rooted in the Latin Aprilis, which is derived from the Latin aperire meaning “to open”—which could be a reference to the opening or blossoming of flowers and trees, a common occurrence throughout the month of April in the Northern Hemisphere.

Who was August named after?

It's the sixth month of the ancient Roman calendar used by the Roman kingdom and republic. Back then, the month of August was known as Sextilus, Latin for “sixth month.” In 8 BCE, the month was named in honor of Augustus Caesar, the first Roman emperor.

What was December named after?

December: December's name come from decem, Latin for “ten." February: Around 690 B.C., Numa Pompilius turned a period of celebration at the end of the year into a month of its own, named after the festival Februa.

Why is December called December?

How did December get its name? It comes from the Latin word decem, meaning ten, because this had been the tenth month of an early Roman calendar.

What was July named after?

July, seventh month of the Gregorian calendar. It was named after Julius Caesar in 44 bce. Its original name was Quintilis, Latin for the “fifth month,” indicating its position in the early Roman calendar.

What was June named after?

June, sixth month of the Gregorian calendar. It was named after Juno, the Roman goddess of childbirth and fertility.

What god is May named after?

MAY. Named for the Roman goddess Maia, who oversaw the growth of plants. Also from the Latin word maiores, “elders,” who were celebrated during this month.

Who is March named after?

The name March is ultimately derived from the Latin word Martius (named after Mars, the Roman god of war). Martius was the name of the first month in the original Roman calendar. Along with January, May, and June, March is one of several months named after a god.

What God is September named after?

In calendar mosaics from Hellín in Roman Spain and Trier in Gallia Belgica, September is represented by the god Vulcan, the tutelary deity of the month in the menologia rustica, depicted as an old man holding tongs.

Who named days of the week?

The Babylonians named each of the days after one of the five planetary bodies known to them (Mercury, Venus, Mars, Jupiter, and Saturn) and after the Sun and the Moon, a custom later adopted by the Romans.

What god is November named after?

In the Imperial period, the deity who often represents November in Roman art is Isis. The festival of Isis, which began October 28, continued through November 3.

Why is December the 12th month?

The meaning of December stems from the Latin word decem, meaning ten. The old Roman calendar started in March, making December the tenth month. When the Roman senate changed the calendar in 153 BCE, the new year started in January, and December became the twelfth month.

Who invented the calendar of 365 days?

To solve this problem the Egyptians invented a schematized civil year of 365 days divided into three seasons, each of which consisted of four months of 30 days each. To complete the year, five intercalary days were added at its end, so that the 12 months were equal to 360 days plus five extra days.