OTHER · ROMAN NUMERAL DATE
Roman Numeral Date Calculator
Convert any Gregorian date to Roman numerals (day · month · year) for wedding invitations, engravings, or monuments — or decode a Roman numeral date back to a calendar date.
Roman numerals cover years 1–3999 using standard subtractive notation. Common use: wedding dates, anniversaries, monuments, and clock faces.
About This Calculator
Converting a date to Roman numerals is common for wedding invitations, anniversary engravings, monuments, and tattoos. This calculator converts any Gregorian calendar date to its Roman numeral representation (day, month, and year each converted independently and concatenated with a dot separator), and also works in reverse — decode any Roman numeral date back to a Gregorian calendar date. Valid range: any date from year 1 to 3999.
How It Works
In Gregorian → Roman mode, select or type any date. The day (1–31), month (1–12), and year (1–3999) are each converted independently to Roman numerals using standard subtractive notation, then joined with a middle-dot separator (e.g. June 14, 2026 → XIV · VI · MMXXVI). In Roman → Gregorian mode, enter three Roman numeral parts separated by any common delimiter (·, ., /, -) and the calculator decodes them to a valid Gregorian date.
The Formula
Each of the three components (day, month, year) is converted independently using the standard 13-symbol Roman numeral table (M, CM, D, CD, C, XC, L, XL, X, IX, V, IV, I) with the subtractive rule. Non-canonical forms like IIII (instead of IV) are rejected. The full date format is D · M · Y, a common convention for inscriptions.
Frequently Asked Questions
- What format does this use for Roman numeral dates?
- Day · Month · Year, with each component converted independently. For June 14, 2026, the result is XIV · VI · MMXXVI. This is the most common convention for inscriptions and formal documents.
- Can I decode Roman numeral dates from other formats?
- Yes — the calculator accepts any separator between the three parts, including dots (XIV.VI.MMXXVI), slashes (XIV/VI/MMXXVI), dashes (XIV-VI-MMXXVI), or spaces. Just keep the D-M-Y order.
- Why are years limited to 3999?
- Standard Roman numerals cover 1 to 3999 using the seven classical symbols. Numbers ≥ 4000 require vinculum (bar) notation, which is non-standard and not supported here — the same limit as the roman-numeral-converter.
- Does this handle leap years?
- Yes — February 29 is valid in leap years (e.g. 2024-02-29 → XXIX · II · MMXXIV) and invalid in non-leap years. Invalid calendar dates are rejected with a descriptive error.