Roman Date Calculator

By Konstantin Bikos and Vigdis Hocken. The Roman calendar is the ancestor of our modern calendar. Some of its features are still in use today. The Roman calendar is the time reckoning system used in ancient Rome. However, because the calendar was reformed and adjusted countless times over the centuries, the term essentially denotes a series of evolving calendar systems, whose structures are partly unknown and vary quite a bit. Also known as the Republican calendar, it is the earliest calendar system from Rome for which we have historical evidence. It was used until 45 BCE , when it was replaced by the Julian calendar. The Republican calendar was derived from a line of older calendar systems whose exact design is largely unknown.

Roman Calendar Terminology

Do you have a question about history? Send us your question at history time. Though there are a few frequently cited inflection points in that history—recorded instances of particular books using one system or another—the things that happened in the middle, and how and when new systems of dating were adopted, remain uncertain.

Systems of dating before B. For example, the Romans generally described years based on who was consul, or by counting from the founding of the city of Rome. So Anno Domini , the year of our Lord, is a very easy transition to make, as opposed to dating the year an emperor had reigned in Rome.

Roman Date Calculator. Roman Date Calculator. Find the Roman Date For: January, February, March, April, May, June, July, August, September, October.

February 12, By Erin Blake. Folger X. Cheney, revised by Michael Jones. Cambridge University Press, , pages For a more informal version, keep reading. The problem of old style and new style years hinges on the question of what day a new year begins.

Now You Know: When Did People Start Saying That the Year Was ‘A.D.’?

The Romans borrowed parts of their earliest known calendar from the Greeks. The calendar consisted of 10 months in a year of days. The Romans seem to have ignored the remaining 61 days, which fell in the middle of winter. The last six names were taken from the words for five, six, seven, eight, nine, and ten. Romulus, the legendary first ruler of Rome, is supposed to have introduced this calendar in the s B.

Roman republican calendar, dating system that evolved in Rome prior to the Christian era. According to legend, Romulus, the founder of Rome, instituted the​.

Any date in the Gregorian calendar can be converted into a corresponding one in the Maya calendar system. Use this interactive tool to convert Gregorian calendar dates into the Maya calendar system. To convert a date, begin by selecting the month from the drop down menu, next type in the day and year. Click the Convert Button to view the corresponding Maya Long Count date, both visually and numerically. For BCE dates enter a negative year number. It tells us about the relationship among all things, including the animals, the land, humans, and everything in the cosmos.

Roman republican calendar

The Roman calendar developed from a group of Italian luni-solar calendars into a purely solar calendar at the end of the 4th century bce in the context of a political and juridical codification. The resulting graphic form of the fasti was unique in its documentation of all the days of the year. At Rome, it served as a frame for religious and historical data. The complex form of intercalation was reduced by C.

Pope Gregory XIII recalculated Caesar’s Julian calendar in , Feeney points out that one of the first certain dates in Roman history is.

At the time of Christ, the Roman calendar and dating system were used throughout the Roman Empire. The calendar derived from the old lunar calendar of the Etruscans, which as designed to keep record of times for religious observances and festivals, and which retained as principal days of the month the kalends first , nones fifth or seventh , and ides thirteenth or fifteenth , based originally on the phases of the moon. The months had been restructured by the Romans into a solar calendar of twelve months with several intercalary days at the end of February.

March was the first Roman month, making September the seventh, October the eighth, etc. These names derive from the Latin words for seven septem , eight octo , and so on. The Roman calendar was reformed by Julius Caesar in 45 B. Roman years were numbered ab urbe condita, “from the founding of the city. John F. Skip to main content. View Chart PDF. Explanation: At the time of Christ, the Roman calendar and dating system were used throughout the Roman Empire.

References: John F.

Calendars and Writing History

Until the autumn of , all the various European countries used the same calendar: the Julian calendar, named after Julius Caesar, who was responsible for its introduction. This calendar change can sometimes make keeping track of seventeenth, and even some eighteenth, century dates a little tricky. To understand why there were two calendars, why one replaced the other, and how the dating in the two systems differs, some background explanation is necessary.

They are human creations: carefully regularized, systematic constructs. They contain so many hours per day, so many days per week, so many weeks per month, so many months per year… repeating year after year after year. The universe, however, is not that perfectly regularized.

In the religious calendar, the commencement of the month was determined by the observation of the crescent New Moon, and the date of the Passover was tied in.

Dual dating is a confusing concept misunderstood by many. The Internet contains much information about the topic, but few sources present the information properly. In fact, there is a lot of misinformation on the Web that serves only to confuse the subject even further. To clear up any confusion regarding the dating conventions used, I have attempted to explain, in simple terms, the concept of dual dating as it applies to historical documentation. Dual dating was a means of documenting dates using both the Julian and Gregorian calendars.

Pope Gregory XIII introduced the Gregorian calendar on 24 February , but the first countries to use the new calendar did not adopt it until 15 October Over the next several years, more and more countries converted to the Gregorian calendar with Turkey being the last in After continued resistance against adopting a Catholic invention, Britain finally converted to the Gregorian calendar on 14 September , so starting with this date, dual dating no longer applied to Britain and its colonies.

It is worth noting that historians do not generally use the Gregorian calendar when recording dates prior to its adoption on 15 October Therefore, dual dating does not apply before 15 October Dual Day Dating. When dual dating, two adjustments occur: the day of the month and the year. When the Gregorian calendar was created in , it was realized that the Julian calendar was 10 days out of synch with the solar year. To restore proper synchronization with the seasons, the new calendar dropped 10 days from the month of October in , and to prevent the problem of extra days from occurring again, 1 day was added to February for every year divisible by four leap year.

Calendar Converter

Convert a date into Roman numerals. Enter month, day and year to translate your date into Roman numerals. You can also convert a Roman numeral date to a number date by entering Roman numerals for the month, day or year. Selecting date format or separation delimiters is optional.

Another change was made to the date in , as this would have been a leap year in the Julian calendar but not in the new Gregorian calendar. So again the.

It took effect the following year, 45 BC AUC , and continued to be used as the civil calendar in some countries into the 20th century. The calendar has a regular year of days divided into 12 months, as listed in Table of months. A leap day is added to February every four years. The Julian year is, therefore, on average The calendar year was intended to approximate the tropical solar year.

Although Greek astronomers had known, at least since Hipparchus , that the tropical year was a few minutes shorter than As a result, the calendar year gained about three days every four centuries compared to observed equinox times and the seasons. This discrepancy was corrected by the Gregorian reform , introduced in The Julian calendar has been replaced by the Gregorian calendar in all countries which formerly used it as the civil calendar. Most Christian denominations have also replaced it by the Gregorian calendar as the basis for their liturgical calendars.

Roman calendar

For him the recurring seasons, not the consuls, mark the year; he knows autumn by his fruits and spring by her flowers. Attributed to Romulus himself, the Roman calendar originally was determined by the cycles of the moon and the seasons of the agricultural year. Beginning in March in the spring and ending in December with the autumn planting, the year then was ten months long and had six months of thirty days and four of thirty-one, for a total of days ten lunar months actually comprise about days.

Since each month began and ended with the new moon, that day would have belonged both to the new month and the old and must have been counted twice. The remnants of this early calendar still can be recognized in the numbered names for Quinctilis July , Sextilis August , September, October, November, and December. The two months of winter, when there was no work in the fields, were not counted; Cato, for example, speaks of payment for olives being due in ten months De Agricultura , CXLVI.

The date December 30th, 0 in the Gregorian calendar corresponds to January 1st​, 1 in the Julian calendar. A slight modification of the Gregorian calendar would.

Civilizations around the world have been celebrating the start of each new year for at least four millennia. For the Babylonians, the first new moon following the vernal equinox—the day in late March with an equal amount of sunlight and darkness—heralded the start of a new year. They marked the occasion with a massive religious festival called Akitu derived from the Sumerian word for barley, which was cut in the spring that involved a different ritual on each of its 11 days. Throughout antiquity, civilizations around the world developed increasingly sophisticated calendars, typically pinning the first day of the year to an agricultural or astronomical event.

In Egypt, for instance, the year began with the annual flooding of the Nile, which coincided with the rising of the star Sirius. The first day of the Chinese new year, meanwhile, occurred with the second new moon after the winter solstice. The early Roman calendar consisted of 10 months and days, with each new year beginning at the vernal equinox; according to tradition, it was created by Romulus, the founder of Rome, in the eighth century B.

A later king, Numa Pompilius, is credited with adding the months of Januarius and Februarius. Over the centuries, the calendar fell out of sync with the sun, and in 46 B. He introduced the Julian calendar, which closely resembles the more modern Gregorian calendar that most countries around the world use today. Romans celebrated by offering sacrifices to Janus, exchanging gifts with one another, decorating their homes with laurel branches and attending raucous parties.

Revelers often enjoy meals and snacks thought to bestow good luck for the coming year. In Spain and several other Spanish-speaking countries, people bolt down a dozen grapes-symbolizing their hopes for the months ahead-right before midnight.


Welcome to Fourmilab ‘s calendar converter! This page allows you to interconvert dates in a variety of calendars, both civil and computer-related. All calculations are done in JavaScript executed in your own browser; complete source code is embedded in or linked to this page, and you’re free to download these files to your own computer and use them even when not connected to the Internet.

Roman dates before 32 BC were typically a day or two before the day with the same Julian date, so 1 January in the Roman calendar of the first year of the.

The Roman calendar was the calendar used by the Roman kingdom and republic. The term usually excludes the Alexandrian calendar of Roman Egypt , which continued the unique months of that land’s former calendar ; the Byzantine calendar of the later Roman Empire , which usually dated the Roman months in the simple count of the ancient Greek calendars ; and the Gregorian calendar , which refined the Julian system to bring it into still closer alignment with the tropical year.

Roman dates were counted inclusively forward to the next of three principal days: the first of the month the kalends , a day shortly before the middle of the month the ides , and eight days—nine, counting inclusively—before this the nones. The original calendar consisted of ten months beginning in spring with March ; winter was left as an unassigned span of days.

These months ran for 38 nundinal cycles, each forming an eight-day week nine days counted inclusively , hence the name ended by religious rituals and a public market. The winter period was later divided into two months, January and February. The legendary early kings Romulus and Numa Pompilius were traditionally credited with establishing this early fixed calendar, which bears traces of its origin as an observational lunar one. In particular, the kalends, nones, and ides seem to have derived from the first sighting of the crescent moon , the first-quarter moon , and the full moon respectively.

The system ran well short of the solar year, and it needed constant intercalation to keep religious festivals and other activities in their proper seasons. This is a typical element of lunisolar calendars. For superstitious reasons, such intercalation occurred within the month of February even after it was no longer considered the last month.

After the establishment of the Roman Republic , years began to be dated by consulships and control over intercalation was granted to the pontifices , who eventually abused their power by lengthening years controlled by their political allies and shortening the years in their rivals’ terms of office.

Roman Dates