Boneyard Tools

Roman numeral date tattoo and engraving guide

How to format a memorable date in Roman numerals, which part order to pick, and how to avoid the common mistakes before you commit to ink or metal.

Open the Roman Numeral Date Converter →

Converting each part on its own

A Roman numeral date is not one giant number. The day, month and year are each converted separately and then set side by side, which is why the pieces stay short and readable. For 25 December 1999 the day 25 becomes XXV, the month 12 becomes XII, and the year 1999 becomes MCMXCIX. Joined with a slash that reads XXV/XII/MCMXCIX. Keeping the parts distinct is what makes the date legible on skin or a narrow band of metal.

Choosing the part order and separator

Order is a style choice, not a rule. Day-Month-Year suits most of the world, Month-Day-Year matches the common United States format, and Year-Month-Day works when the numerals are stacked vertically down an arm or spine. The separator sets the rhythm: dots and dashes with spaces give an airy, monument-like feel, while a slash packs the parts tightly. Preview a few combinations here and read each one aloud before deciding, because the same date can look very different depending on these two settings.

Common mistakes to avoid

The most frequent error is writing 4 as IIII or 9 as VIIII instead of the standard IV and IX. Another is padding single digits with a zero, but Roman numerals have no zero, so the 6th is simply VI. People also mix up the month number and its name, so double-check that June is 6 and becomes VI, not VII. This converter always produces the canonical subtractive form, which removes the guesswork before an artist or engraver starts.

Proofing before you commit

Ink and engraving are permanent, so treat the numerals like final artwork. Copy the exact string from this tool and paste it into the message you send your artist rather than transcribing it by hand, since a single dropped I or C changes the year. Ask for a stencil or proof and compare it character by character against the copied text. If the date includes a year near a century mark, such as 1999 or 2000, pay extra attention because those years use several stacked symbols where a slip is easy to miss.

Frequently asked questions

Should the month be its number or its name?

Its number. A Roman numeral date uses the month position from 1 to 12, so June is 6 and converts to VI. There is no Roman way to spell out month names, so the numeric month is the standard approach.

How do I make the numerals read vertically for an arm tattoo?

Pick the Year-Month-Day order and a simple separator, then have your artist stack the three numerals on separate lines. The tool gives you the correct symbols; the vertical layout is a placement decision made on the stencil.