Years in Roman Numerals: From MCMXC to MMXXVI

Writing years in Roman numerals: what it is used for

Years are the most common reason people convert Roman numerals today. A birth year on an engraving, a wedding date on an invitation, the year of construction above a front door or the founding year of a club: in Roman numerals, years look solemn. At the same time they are especially error-prone, because they have four places and often contain the subtractive pairs CM, XC and IX.

The quickest route is the Roman numerals converter with its year shortcuts. If you want to understand the method, you will find it here step by step.

The four-step method

1. Split the year into thousands, hundreds, tens and ones. 1987 becomes 1000 + 900 + 80 + 7.

2. Translate each place separately: 1000 = M, 900 = CM, 80 = LXXX, 7 = VII.

3. Put the parts together without spaces: MCMLXXXVII.

4. Check backwards: M (1000) + CM (900) + LXXX (80) + VII (7) = 1987.

The crucial point is step 2: each place is translated on its own, never across place boundaries. This prevents mistakes such as MIM for 1999. The correct form is 1000 + 900 + 90 + 9 = M + CM + XC + IX = MCMXCIX.

Years in the 20th century: everything starts with MCM

All years from 1900 to 1999 start with MCM, because 1900 = 1000 + 900. After that only tens and ones follow:

1988 is strikingly long with MCMLXXXVIII (11 symbols). Round years, on the other hand, are short, such as 1950 = MCML.

Years from 2000: everything starts with MM

Since the year 2000, writing years has become much easier. All years start with MM, and up to 2099 only tens and ones follow:

Watch out for years with a 4 or 9 in the last place: 2024 is MMXXIV and not MMXXIIII, 2029 is MMXXIX and not MMXXVIIII.

Writing full dates in Roman numerals

For wedding dates or engravings, the complete date is often written in Roman numerals. It is common to separate the parts with dots or middle dots: 14 June 2025 becomes XIV.VI.MMXXV or XIV · VI · MMXXV. Translate day and month exactly like the year. For months: January = I, April = IV, September = IX, December = XII.

Because three Roman numerals stand directly next to each other in such a date, a clear separator is worthwhile. Without separators, XIVVIMMXXV would be barely readable and even ambiguous.

Before engraving: check three times

One swapped symbol changes the number: MCMXCI is 1991, MCMIXC is not a valid numeral at all. Always check years backwards by typing the Roman numeral into the converter. If it is written incorrectly, the converter explains which rule is broken and suggests the correct notation. The basic rules behind it are explained in detail in the main article Reading and writing Roman numerals.