What format does the Roman Date Converter use?

The converter uses a dot-separated format where each date component (month, day, year) is converted to Roman numerals and joined with dots. For example, March 3, 2026 becomes III.III.MMXXVI where III represents March (3rd month), III represents the 3rd day, and MMXXVI represents the year 2026.

What is the maximum year the converter supports?

The converter supports years from 1 to 3999, which is the traditional range for Roman numerals. The number 3999 is represented as MMMCMXCIX. Dates beyond this range require extended Roman numeral notation that is not commonly used in modern applications.

Did the Romans actually write dates this way?

Ancient Romans used a different calendar system with named months, Kalends, Nones, and Ides for day references. The dot-separated Roman numeral format used by this converter is a modern adaptation that applies Roman numeral notation to the Gregorian calendar system for decorative and commemorative purposes.

Can I convert dates with invalid day numbers?

No, the converter validates all dates to ensure they are legitimate calendar dates. For example, it will reject February 30 or month 13. It also accounts for varying month lengths including February with 28 or 29 days in leap years.

Where are Roman numeral dates commonly used today?

Roman numeral dates are commonly found on building cornerstones, war memorials, clock faces, movie copyright notices, wedding invitations, university diplomas, and architectural inscriptions. They convey a sense of tradition, permanence, and formality.

How do I read a Roman numeral date on a building?

Building dates are typically inscribed as the year only (e.g., MCMXCVIII for 1998) or in full dot-separated format. Read each Roman numeral group individually: identify the month (I through XII), the day, and the year. Use this converter to quickly decode any Roman numeral date you encounter.

Roman Date Converter

Convert dates to and from Roman numeral format for historical references, decorative inscriptions, and educational purposes

roman

date

numeral

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Quick Presets

Common date conversions for quick testing

Input & Settings

Choose a direction, enter a date or Roman numeral date, and convert in one step.

Month

Day

Year

How it works: Converts dates to and from Roman numeral format using dot-separated notation (Month.Day.Year). Each part is individually converted between Arabic numbers and Roman numerals. Years are supported from 1 to 3999.

Roman Date Format Reference

Months

I = January

II = February

III = March

IV = April

More Months

V = May

VI = June

VII = July

VIII = August

Late Months

IX = September

X = October

XI = November

XII = December

Example Dates

I.I.MMXXVI = Jan 1, 2026

VII.IV.MMXXVI = Jul 4, 2026

XII.XXV.MMXXV = Dec 25, 2025

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