To write a date in roman numerals, you must convert the month into its numeric equivalent (January = 1, February = 2...October = 10 etc.) Then you must decide which date format to use: MMDDYYYY or MMDDYY or DDMMYY or DDMMYYYY etc. I believe it is common to follow the MMDDYYYY format. When separating each number group, you can use either a space, a dash or a period. Therefore, the date January 14, 2010 could look like I.XIV.MMX.
Another way of representing the date so that there is no confusion between the month and the day is to show the month in latin: JANUARIUS, FEBRUARIUS, MARTIUS, APRILIS, MAIUS, JUNIUS, JULIUS, AUGUSTUS, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER.
If you want to be as authentic as possible, Romans did not have the 'J' or 'U' in their alphabet so the months would look like: IANVARIVS, FEBRVARIVS, MARTIVS, APRILIS, MAIVS, IVNIVS, IVLIVS, AVGVSTVS, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER.
The months can be shown in either upper- or lowercase. The months can be abbreviated to three letters followed by a stop, except for MART. and SEPT.
In this format, January 14, 2010 could look like IAN.XIV.MMX or XIV.ian.MMX etc.
The date 03.04.1989 is written in roman numerals as III.IV.MCMLXXXIX
The date of birth 12-02-2009 in Roman numerals would be XII.II.MMIX
The date 15-04-1990 can be represented by the Roman numerals XV.IV.MCMXC
The date 19-02-1986 written in Roman numerals would be XIX.II.MCMLXXXVI
The date 01-06-1981 in Roman numerals is I.VI.MCMLXXXI
It is XVI.VII.MMIII
First, you need to give a date of birth
The date 12-04-1967 can be represented by the Roman numerals XII.IV.MCMLXVII
The date 31-05-1987 can be written in Roman numerals as XXXI.V.MCMLXXXVII