1999 in Roman Numerals
1999 in Roman numerals is MCMXCIX. It is built from four parts: 1000 + 900 + 90 + 9 = M + CM + XC + IX. Read it from left to right and add the values to get 1999. Below, 1999 appears in a date, on a copyright line and as a two-digit year.
1999 in Roman numerals is MCMXCIX.
1999 in Roman numerals: the breakdown
| Place value | Numeral | Value |
|---|---|---|
| 1000 | M | 1000 |
| 900 | CM | 900 |
| 90 | XC | 90 |
| 9 | IX | 9 |
| Total | MCMXCIX | 1999 |
Why MCMXCIX and not MIM?
MCMXCIX uses the subtractive pairs CM, XC and IX. Written by adding only, 1999 would be MDCCCCLXXXXVIIII, but a letter may repeat only three times in a row, and MDCCCCLXXXXVIIII repeats C four times. The shortcut MIM is also wrong: a smaller letter can be subtracted only from the next two larger letters: I before V or X, X before L or C, C before D or M.
How to read MCMXCIX
- M is 1000.
- CM is 1000 minus 100, which is 900.
- XC is 100 minus 10, which is 90.
- IX is 10 minus 1, which is 9.
- Add 1000 + 900 + 90 + 9 to get 1999.
Roman numeral 1999 in a date
| Order | 1 January 1999 | 31 December 1999 |
|---|---|---|
| MM.DD.YYYY | I.I.MCMXCIX | XII.XXXI.MCMXCIX |
| DD.MM.YYYY | I.I.MCMXCIX | XXXI.XII.MCMXCIX |
| YYYY.MM.DD | MCMXCIX.I.I | MCMXCIX.XII.XXXI |
For 1 January the first two orders match, because the day and the month are both I. For any other day, order or separator, use the Roman numeral date converter with 1999 filled in.
1999 on a copyright line
© MCMXCIX
Film and television end credits commonly show the copyright year in Roman numerals, so 1999 appears as © MCMXCIX.
1999 as a two-digit year
As a style choice, some people write only the last two digits of a year: ’99 gives XCIX for 1999. The full year, MCMXCIX, is the standard form.
Facts about 1999
- 1999 is not a leap year: it is not divisible by 4.
- 1999 has 365 days.
- 1 January 1999 falls on a Friday.
- 1999 is in the 1990s.
- 1999 is in the 20th century.
Years around 1999
Convert another year
1999 = 1000 + 900 + 90 + 9 = M + CM + XC + IX
What number is MCMXCIX?
MCMXCIX is the year 1999. Reading it from left to right, M is 1000, CM is 900, XC is 90 and IX is 9, which adds up to 1999.
Questions and answers
What is 1999 in Roman numerals?
1999 in Roman numerals is MCMXCIX. It is made of four parts: 1000 + 900 + 90 + 9 = M + CM + XC + IX. Read MCMXCIX from left to right, add the parts, and you get 1999. Use the converter on this page to check any other number from 1 to 3,999.
How do you write 1999 in Roman numerals?
Split 1999 into its place values, write each one in Roman numerals, and join them from largest to smallest. For 1999 that is 1000 + 900 + 90 + 9, which is M + CM + XC + IX, so the answer is MCMXCIX. Check that no letter repeats more than three times in a row.
What number is MCMXCIX?
MCMXCIX is 1999. Read it in place-value parts from left to right: M is 1000, CM is 900, XC is 90, IX is 9. Add the parts to get 1999. Letters after a larger or equal letter are added, and a smaller letter before a larger one is subtracted. You can also type MCMXCIX into the converter to read the number back.
Why is 1999 written MCMXCIX and not MIM?
MCMXCIX is the standard form. MIM breaks a rule: a smaller letter can be subtracted only from the next two larger letters: I before V or X, X before L or C, C before D or M. Writing MCMXCIX keeps every letter within those limits and makes 1999 easy to read at a glance.
How do you write 1999 on a date in Roman numerals?
Convert the month, the day and the year separately and join them with dots. For 1 January 1999 in US order that is I.I.MCMXCIX, and for 31 December 1999 it is XII.XXXI.MCMXCIX. The date converter lets you choose the order, the separator and a two-digit year.