Convert dates to and from Roman numerals, e.g. 20.IX.MMXXVI. Supports both directions and any year 1-3999. Free online date converter. All processing runs locally in your browser. Your data is not uploaded to any server.
100% Local Processing
How to Use
Write a date as a date on ancient stone: XX.IX.MMXXVI for 20 September 2026. Convert in either direction, year 1 through 3999.
Steps
Enter a date as YYYY-MM-DD, or a Roman date using dots like XX.IX.MMXXVI.
Set the direction to match what you typed.
Click Convert and read the other representation.
What the result shows
The full Roman date in the classic day.month.year form.
Day, month and year separately in Roman numerals.
The Gregorian date when converting the other way.
Explanatory rows for each Roman numeral value.
Features
Uses standard subtractive notation, so 4 is IV not IIII.
Works for every date in the supported range.
Conversion is instant and fully local.
All processing runs locally in your browser. Your data is not uploaded to any server.