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- The month, day and year are each converted to Roman numerals and joined with a separator.
- Choose month-first, day-first or year-first order, and dots, slashes, dashes or spaces.
- The same tool converts any number from 1 to 3999 to Roman numerals, and Roman numerals back to numbers.
- Years above 3999 cannot be written in standard Roman numerals.
How to use the date to Roman numerals converter
Pick a date
Choose Date, then select the day, month and year. It starts on the current date.
Choose the order and separator
Pick month-first (US), day-first or year-first, and dots, slashes, dashes or spaces.
Copy the result
The headline shows the full Roman date. The details show each part and the year alone.
Convert other values
Switch to Number to Roman or Roman to number for years, ages or any value up to 3999.
How Roman numerals work
Roman numerals use seven letters. The calculator converts the month number (1 to 12), the day number (1 to 31) and the year separately. January is I, February II, and so on up to December, which is XII.
Roman numeral rules
Add letters from the largest to the smallest: MMXXVI = 1000 + 1000 + 10 + 10 + 5 + 1 = 2026
Subtract when a smaller letter comes first: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900
Repeat a letter no more than three times in a row
Roman numerals have no zero, so two-digit years that end in 00 use the full year instead.
Roman numeral letters
The seven letters and their values.
- I 1
- V 5
- X 10
- L 50
- C 100
- D 500
- M 1000
Every number from 1 to 3999 is built from these seven letters.
Date to Roman numerals examples
Example 1: November 6, 2026 (month first)
Dots between the parts.
- Month (11) XI
- Day (6) VI
- Year (2026) MMXXVI
- Result XI.VI.MMXXVI
The same date day-first with slashes is VI/XI/MMXXVI.
Example 2: July 4, 1776
Month first, with dots.
- Month (7) VII
- Day (4) IV
- Year (1776) MDCCLXXVI
- Result VII.IV.MDCCLXXVI
1776 is M (1000) + D (500) + CC (200) + LXX (70) + VI (6).
Example 3: December 25, 2025 (day first)
Day, month, year with dots.
- Day (25) XXV
- Month (12) XII
- Year (2025) MMXXV
- Result XXV.XII.MMXXV
Day-first order is common in the UK, Europe and many other countries.
Where a Roman numeral date helps
Tattoo designs
Get the date in a clean format and keep the separators so it reads clearly.
Weddings and anniversaries
Use a Roman date on invitations, rings and signs.
Engraved gifts
Check the numerals before engraving a watch, frame or jewelry.
Plaques and cornerstones
Write a year or full date the traditional way.
Roman dates are easy to misread, so keep the separators and agree on the order, month first or day first, before engraving or tattooing. Related tools: Age Calculator and Julian Date Converter.
Date to Roman numerals FAQ
How do you write a date in Roman numerals?
Convert the month, the day and the year on their own, then join them with dots, slashes or dashes. November 6, 2026 becomes XI.VI.MMXXVI.
Why use separators in a Roman numeral date?
Without them the letters run together. XIVIMMXXVI could be read several ways, while XI.VI.MMXXVI is clear.
How do I write 2026 and 2025 in Roman numerals?
2026 is MMXXVI and 2025 is MMXXV.
What is the largest year that can be written?
3999, which is MMMCMXCIX. Standard Roman numerals have no symbol for 5000 or more, so later years are not supported.
Can I write a two-digit year?
Yes, choose Last two digits in the Year option. 2026 becomes XXVI. A year ending in 00 has no Roman form, so the full year is used.
How do I convert Roman numerals back to numbers?
Switch the first option to Roman to number and type the numeral. MCMXCIV gives 1994. Invalid forms such as IIII or IC are rejected.