2009 in Roman Numerals
2009 in Roman numerals is MMIX. It is built from two parts: 2000 + 9 = MM + IX. Read it from left to right and add the values to get 2009. Below, 2009 appears in a date, on a copyright line and as a two-digit year.
2009 in Roman numerals is MMIX.
2009 in Roman numerals: the breakdown
| Place value | Numeral | Value |
|---|---|---|
| 2000 | MM | 2000 |
| 9 | IX | 9 |
| Total | MMIX | 2009 |
Why MMIX and not MMVIIII?
MMIX uses the subtractive pair IX. Written by adding only, 2009 would be MMVIIII, but a letter may repeat only three times in a row, and MMVIIII repeats I four times.
How to read MMIX
- MM is 1000 + 1000, which is 2000.
- IX is 10 minus 1, which is 9.
- Add 2000 + 9 to get 2009.
Roman numeral 2009 in a date
| Order | 1 January 2009 | 31 December 2009 |
|---|---|---|
| MM.DD.YYYY | I.I.MMIX | XII.XXXI.MMIX |
| DD.MM.YYYY | I.I.MMIX | XXXI.XII.MMIX |
| YYYY.MM.DD | MMIX.I.I | MMIX.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 2009 filled in.
2009 on a copyright line
© MMIX
Film and television end credits commonly show the copyright year in Roman numerals, so 2009 appears as © MMIX.
2009 as a two-digit year
As a style choice, some people write only the last two digits of a year: ’09 gives IX for 2009. The full year, MMIX, is the standard form.
Facts about 2009
- 2009 is not a leap year: it is not divisible by 4.
- 2009 has 365 days.
- 1 January 2009 falls on a Thursday.
- 2009 is in the 2000s.
- 2009 is in the 21st century.
Years around 2009
Convert another year
2009 = 2000 + 9 = MM + IX
What number is MMIX?
MMIX is the year 2009. Reading it from left to right, MM is 2000 and IX is 9, which adds up to 2009.
Questions and answers
What is 2009 in Roman numerals?
2009 in Roman numerals is MMIX. It is made of two parts: 2000 + 9 = MM + IX. Read MMIX from left to right, add the parts, and you get 2009. Use the converter on this page to check any other number from 1 to 3,999.
How do you write 2009 in Roman numerals?
Split 2009 into its place values, write each one in Roman numerals, and join them from largest to smallest. For 2009 that is 2000 + 9, which is MM + IX, so the answer is MMIX. Check that no letter repeats more than three times in a row.
What number is MMIX?
MMIX is 2009. Read it in place-value parts from left to right: MM is 2000, IX is 9. Add the parts to get 2009. Letters after a larger or equal letter are added, and a smaller letter before a larger one is subtracted. You can also type MMIX into the converter to read the number back.
Why is 2009 written MMIX and not MMVIIII?
MMIX is the standard form. MMVIIII breaks a rule: a letter may repeat only three times in a row, and MMVIIII repeats I four times. Writing MMIX keeps every letter within those limits and makes 2009 easy to read at a glance.
How do you write 2009 on a date in Roman numerals?
Convert the month, the day and the year separately and join them with dots. For 1 January 2009 in US order that is I.I.MMIX, and for 31 December 2009 it is XII.XXXI.MMIX. The date converter lets you choose the order, the separator and a two-digit year.