Roman Numeral Date Converter

Each part is converted independently and then joined by a separator. The day, month and year each become their own Roman numeral, so 11 June 2026 in day-month-year order with dots is XI . VI . MMXXVI. The three numerals are never merged into a single running number.

Day-Month-Year is the most common style worldwide, while Month-Day-Year is popular in the United States. Year-Month-Day reads well for a stacked or vertical layout. All three are valid, so pick the reading order you prefer and preview it before committing.

The Separator menu offers a dot with spaces, a slash, a dash with spaces, or a plain space. The dot and dash keep the parts visually distinct for engraving, while the slash gives a compact look. The choice only changes the joining text, not the numerals themselves.

Roman numerals have no symbol for zero, so single-digit days and months are written plainly. The 6th month is VI and the 4th day is IV, with no padding. This is expected and correct for a Roman numeral date.

Subtractive notation places a smaller symbol before a larger one to subtract, so 4 is IV and 9 is IX rather than IIII or VIIII. This converter always outputs the standard subtractive form, which is why 1999 becomes MCMXCIX.

Standard Roman numerals reach 3999, written MMMCMXCIX. The Year box accepts 1 to 3999, which covers every historical and near-future date you are likely to engrave. Values outside that range are rejected because classical numerals cannot express them.

Yes. The day is checked against the length of the chosen month, so February rejects days above 29 and April rejects days above 31. If a part is out of range the tool shows a short message instead of a numeral. Note that it allows February 29 in any year rather than checking leap years.

The underlying engine includes a parser that reads a Roman numeral and returns its integer value, and it rejects non-standard forms such as IIII or VV. The on-page converter itself focuses on turning a date into numerals for copying.

Yes. The conversion runs entirely in your browser, so the date you enter is never sent to a server or stored. You can copy the numerals and close the page with nothing left behind.