Dates in December
December Dates in Roman Numerals
December is month 12, so it is written XII in a Roman numeral date. Choose a year and day to open the complete Date Page.
Month numeral
XIIDecember is month 12Browse December dates
Choose a day in December 2026
Select a year and day, then open the permanent Date Page for that conversion.
Compare formats
December 8, 2026 in different date orders
Each line represents the same date. Only the order of the month, day and year changes.
Understanding the month
What XII means in a date
The labels and date order tell you whether XII is being used as the month.
XII means 12
It represents December only when the surrounding date format identifies it as the month.
Use a clear date format
Keep the ordinary date with the Roman result when it will be printed, engraved or used permanently.
Need to know
Common questions about December dates
How December is written, how many days it has and how to browse another year.
How is December written in Roman numerals?
December is the 12th month, so its month number is written XII in Roman numerals.
Does XII always mean December?
No. XII always represents the number 12. It represents December only when the date order or surrounding label identifies it as the month.
How many days are in December?
December has 31 days in 2026. The calendar above prevents links to impossible dates.
Can I browse December dates in another year?
Yes. Change the year in the calendar. The selection updates the permanent Date Page link without creating another indexable Month Hub URL.