Learning the months names in order is one of the first calendar skills most children acquire, yet the names themselves carry two thousand years of history. January honours a two-faced god, March marches to war, July and August are named for emperors, and September through December count in Latin from seven to ten, even though they are now the ninth to twelfth months of the year. This guide explains the months names in order, what each one means, where it came from, and how the calendar changed to produce the list we use today.
The modern list feels natural because we use it every day, but it is the result of reforms, politics and practical astronomy. The Roman calendar began the year in March, added months, borrowed names from gods and rulers, and was eventually reformed by Julius Caesar and later by Pope Gregory XIII. Following that story makes the names easier to remember, because each one stops being an arbitrary label and becomes a small piece of history.
Months Names in Order
The months names in the Gregorian calendar, the system used across most of the world today, run as follows: January, February, March, April, May, June, July, August, September, October, November and December. Children often learn them with a song or a rhyme, and adults use them so automatically that the order rarely needs thought. Yet the order itself is worth pausing over, because it was not always this way, and the names still betray an older arrangement.
A useful memory trick is to group the year in pairs or seasons. January and February form the deep winter pair in the northern hemisphere; March and April bring spring; May and June lead into summer; July and August are the high summer months; September and October mark the turn to autumn; November and December close the year in late autumn and early winter. In the southern hemisphere the seasons are reversed, but the order of the months names stays the same, which is a reminder that the calendar is a shared convention rather than a description of local weather. Teachers find that the months names become easier once pupils learn the Roman stories behind them.
Another trick is the knuckle method for remembering month lengths: months with thirty-one days and those with thirty or fewer. That method does not explain the names, but it pairs naturally with learning them, and teachers often introduce the two together. Once the order is secure, the meanings below give each name a hook that makes recall easier and more interesting.
January, February and March: Gods, Purification and War
January takes its name from Janus, the Roman god of doors, gates and beginnings, who was depicted with two faces, one looking back and one looking forward. That image suits the first month of the year perfectly: a doorway between the old year and the new. The festival of Janus fell at the start of January, and the month became associated with fresh starts, resolutions and new undertakings, associations that survive in modern New Year customs. A song that lists the months names in order is helpful, but the meanings give each name a lasting hook.
February comes from Februa, a Roman festival of purification held in that month. The Latin verb februare meant to purify, and the festival involved ritual cleansing as winter drew towards its end. February’s short length is a separate story, tied to calendar reform: when the calendar was adjusted to fit the solar year, February became the month that absorbed the changes, and it remains the month that gains a leap day every four years, with century exceptions.
March is named for Mars, the Roman god of war. In the early Roman calendar, March was the first month of the year, which made practical sense: winter campaigning was difficult, so armies mustered and wars resumed in spring. The year’s beginning in March explains several features of the later calendar, including the numbering of September to December, and it survives in the financial and academic years of some countries, which still begin in spring rather than January. The puzzle of the months names, where September means seven, is a favourite classroom example of language preserving history.
April, May and June: Spring and Growth
April’s origin is less certain than that of its neighbours. One popular explanation links it to the Latin aperire, meaning to open, referring to buds and flowers opening in spring. Another links it to Aphrodite, the Greek goddess of love, known to the Romans as Venus. Scholars debate which explanation is correct, and the honest answer is that both have supporters. That uncertainty is itself instructive: not every month name has a single, settled derivation.
May is named for Maia, a Roman goddess of growth and fertility, whose festival fell in that month. The name connects naturally with spring growth, with the Roman countryside coming into full leaf, and with later May Day customs across Europe. Maia’s name also gives us the word “major” in some etymological discussions, although the goddess and the adjective have separate, if related, roots in the idea of greatness and growth. Across Europe, the months names show how widely Roman administration spread, with local spellings adapting the same roots.
June honours Juno, queen of the Roman gods and protector of marriage and childbirth. June has long been a popular month for weddings, a tradition often linked to Juno’s patronage, although practical reasons, such as fine weather and the availability of flowers, surely play a part as well. The pairing of May and June, a growth goddess followed by a marriage goddess, gives the late spring months a pleasing, if coincidental, thematic flow.
July and August: Months Named for Emperors
July was originally called Quintilis, meaning “fifth month”, because in the old March-start calendar it was indeed the fifth month. It was renamed for Julius Caesar, who was born in that month and whose calendar reform, the Julian calendar, shaped timekeeping for over fifteen centuries. Renaming a month for a ruler was a bold political act, and it set a precedent that his successor followed. Anyone learning English as an additional language benefits from studying the months names alongside their Latin origins.
August was originally Sextilis, the sixth month, and it was renamed for Augustus, the first Roman emperor and Julius Caesar’s adopted heir. According to tradition, August was given thirty-one days so that it would not be shorter than July, although historians note that the lengths of the months were adjusted at various points for administrative reasons. The story, whether exact or embellished, captures something real: calendar reform in the ancient world was inseparable from politics, prestige and the desire to be remembered.
The imperial pair, July and August, sit at the heart of summer in the northern hemisphere, and their names are used in dozens of languages, sometimes with local spelling changes. That survival is a measure of Rome’s lasting influence: two men who died two thousand years ago still label the holiday months of the modern world. The months names also appear in literature, where a month can signal season, mood or a turning point in a story.
September to December: The Counting Months
September, October, November and December are the most transparent of the months names, once the old calendar is understood. They come from the Latin numbers septem (seven), octo (eight), novem (nine) and decem (ten). In the early Roman calendar, which began in March, September was the seventh month, October the eighth, November the ninth and December the tenth. The names are perfectly logical in that system.
When January and February were moved to the start of the year, the counting months were pushed two places later, but their names did not change. September became the ninth month while still meaning seven, and December became the twelfth while still meaning ten. That mismatch puzzles many learners, but it is also a gift: it preserves, in everyday language, a record of how the calendar once worked. Other traces survive too, in words such as “decimate”, originally a punishment of one soldier in ten, and “octopus”, the eight-footed creature. Calendar reform changed the length of the year, yet the months names survived both the Julian and Gregorian changes.
December’s position at the year’s end has made it a month of festivals across cultures, from Roman Saturnalia to modern winter holidays. Its name, meaning ten, is a quiet reminder that calendars are human inventions, revised over time, and that the labels we inherit do not always match the system we use today.
Months Names and Calendar Reform
The months names survived two great reforms that changed how the year was measured. The Julian reform of 45 BC, introduced by Julius Caesar on the advice of the astronomer Sosigenes, set the year at 365 days with a leap day every four years. It kept the Roman month names, adjusted their lengths, and gave the calendar a stability it had previously lacked, when extra months were inserted by priests for political reasons. Remembering the months names is simpler when January and February are understood as later additions to the front of the year.
By the sixteenth century, however, the Julian year, slightly longer than the true solar year, had drifted by about ten days, throwing the date of Easter out of alignment with the seasons. Pope Gregory XIII introduced the Gregorian calendar in 1582, dropping ten days and refining the leap-year rule: century years are leap years only if divisible by four hundred. Britain and its colonies did not adopt the reform until 1752, by which time eleven days had to be dropped, causing confusion and protest that still feature in popular histories of the calendar.
Through both reforms, the months names remained unchanged. That continuity is remarkable, and it explains why a modern schoolchild uses essentially the same labels as a Roman citizen, even though the year is measured far more accurately today. For readers who enjoy word origins more broadly, our guides to monthly and yearly meanings and monthly pricing language show how month words shape everyday questions about money and services.
| Month | Position now | Origin | Meaning |
|---|---|---|---|
| January | 1st | Janus | God of beginnings and doorways |
| February | 2nd | Februa | Festival of purification |
| March | 3rd | Mars | God of war; once the first month |
| April | 4th | Aperire or Aphrodite | Opening, or goddess of love |
| May | 5th | Maia | Goddess of growth |
| June | 6th | Juno | Queen of the gods; marriage |
| July | 7th | Julius Caesar | Renamed from Quintilis, fifth |
| August | 8th | Augustus | Renamed from Sextilis, sixth |
| September | 9th | Septem | Seven |
| October | 10th | Octo | Eight |
| November | 11th | Novem | Nine |
| December | 12th | Decem | Ten |
Months Names in Other Languages and Cultures
Many languages borrow the Roman months names with local spelling, so January becomes janvier in French, enero in Spanish and Januar in German. Other languages preserve older native names alongside or instead of the Roman list. In parts of central Europe, for example, month names describe natural events, such as flowering or harvest, rather than gods and emperors. In Welsh, several month names are descriptive in a similar way.
Other calendar systems use entirely different month names. The Islamic calendar, a lunar system, has months such as Ramadan and Shawwal, whose names reflect pre-Islamic Arab traditions. The Hebrew calendar, the Hindu calendars, the Chinese lunar calendar and many indigenous systems each have their own month names, often tied to agriculture, festivals or the moon. The Gregorian list is therefore best seen as one widely shared system, not as the only way to divide the year.
Even within English, month names appear in surnames, place names and phrases. April, May and June are used as given names, August as both a name and an adjective meaning dignified, and March as a verb and a surname. The calendar has leaked into everyday language in ways that reward a moment’s attention, and noticing those links is part of the pleasure of word history.
Frequently Asked Questions
What are the months names in order?
January, February, March, April, May, June, July, August, September, October, November and December. That is the order of the Gregorian calendar used across most of the world today.
Why do September to December mean seven to ten?
Because the early Roman year began in March, making September the seventh month and December the tenth. When January and February moved to the start of the year, the names stayed the same even though the positions shifted by two.
Which months are named for people?
July is named for Julius Caesar and August for Augustus. The other months are named for gods, festivals or numbers, with April’s origin still debated between a spring opening and Aphrodite.
Why is February the shortest month?
February absorbed the adjustments made when the calendar was reformed to fit the solar year, and it remains the month that gains the leap day. Its short length is a legacy of those reforms, not of its festival of purification.
Conclusion
The months names are far more than labels on a diary page. They preserve a Roman doorway god in January, a purification festival in February, a war god in March, goddesses of growth and marriage in May and June, two emperors in July and August, and a counting system in September to December that still remembers a year that began in spring. Each name is a small, durable piece of history, carried forward through the Julian and Gregorian reforms into the present day.
Learning them in order is the first step, and understanding them is the second. Once the stories behind the names are known, the calendar becomes easier to remember and more interesting to use. The next time you write a date, you are, whether you realise it or not, using words that have travelled from Roman festivals, battlefields and imperial courts to your own desk. That is a remarkable journey for twelve ordinary words, and it is why the history of the months names is worth knowing. That living history is what makes the months names worth learning beyond mere order.
