Date to Roman Numerals (Copyright Notation)

Movie credits, copyright notices, and chiseled monuments all use Roman numerals. Convert any year, month, or full date in both directions: numbers to numerals, and numerals back to numbers.

How to use the Date to Roman Numerals (Copyright Notation)

Pick a direction. Number → Roman accepts 1-3999. Roman → Number accepts I, V, X, L, C, D, M with subtractive notation (IV = 4, IX = 9, CM = 900).

How Roman numerals encode a year

Roman numerals build numbers from seven letters — I (1), V (5), X (10), L (50), C (100), D (500), M (1000) — added left to right, with a smaller letter before a larger one meaning subtraction (IV = 4, IX = 9, CM = 900). A year like 2026 becomes MM (2000) + XX (20) + V (5) + I (1), written MMXXVI.

The system has no zero and, in standard form, no way to write beyond 3999 without overlines, which is why this converter caps there. It works both directions, so you can decode the date carved on a cornerstone or the copyright line in a film's credits as easily as you encode one.

Common use cases

  • Copyright notices — render a year as MMXXVI for a film, book, or website footer.
  • Film and TV credits — follow the long-standing convention of dating productions in numerals.
  • Monuments and cornerstones — decode the date chiselled on a building or statue.
  • Watch and clock faces — check how a number reads in numerals.
  • Tattoos and design work — get an accurate numeral string before it becomes permanent.

Frequently asked questions

Why does it stop at 3999?
Standard Roman numerals cannot write 4000 or more without an overline (the vinculum), which multiplies a numeral by 1000. Most uses — years, copyright dates — fall well under 3999, so the converter keeps to the unambiguous range.

Is there a Roman numeral for zero?
No. The Roman system has no symbol for zero; medieval scholars used the Latin word "nulla" when they needed the concept. Numerals start at I (1).

How does subtractive notation work?
A smaller numeral placed before a larger one is subtracted: IV is 4, IX is 9, XL is 40, XC is 90, CD is 400, CM is 900. Only those specific pairs are valid — you would never write IL for 49.

Why do some clocks show IIII instead of IV for four?
Many clock and watch faces use IIII for 4 by tradition, partly for visual balance with the VIII opposite it. Strictly, the correct numeral is IV, which this converter uses.
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