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Roman Numeral Date Converter

Convert any date into Roman numerals.

Roman numeral date

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What this calculator does

This calculator converts the month, day, and year of any date into Roman numerals, in either month-day-year or day-month-year order.

Worked example

September 3, 2026 converts to IX.III.MMXXVI in month-day-year order.

Common mistakes

  • Mixing up month-day and day-month order. The US typically writes month first; most other countries write the day first — double-check before ordering an engraving.
  • Adding a zero. Roman numerals have no symbol for zero, so a date like the 10th of the month is just X, not a leading placeholder.

Frequently asked questions

How are dates converted to Roman numerals?+

Each part of the date — month, day, and year — is converted separately into its Roman numeral equivalent, then joined with periods.

What's a common use for a Roman numeral date?+

Roman numeral dates are popular for tattoos, wedding invitations, and engravings marking a birthday, wedding, or anniversary.

Why do some numbers use subtractive notation, like IV for 4?+

Roman numerals avoid repeating a symbol more than three times in a row, so a smaller numeral placed before a larger one is subtracted instead — for example, IV (5-1=4) instead of IIII.

How do you write a birthday or wedding date in Roman numerals for a tattoo?+

Convert the month, day, and year separately, then join them with periods in your preferred order (e.g. month.day.year). This roman numeral date converter generates that exact string so you can copy it directly for a tattoo artist or engraver.

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