It is: IV-XI-MMXII
VII.XI.MMXII
In todays modern notation of Roman numerals: IV-XI-MCMLXXVI
It is: XI-I-MMXII
It is: XI-XII-MMXII
It is: XI-IX-MMXII
It is: VIII-XI-MMXII
It is: XII-XI-MMXII
The date can't be expressed in Roman Numerals since it's incompatible with that number system. You can possibly work out with only numbers, such as 2 or 11.
The number 11 is written as XI in roman numerals.
April-XI-MMX or if you prefer IV-XI-MMX
The number 11 can be represented by the Roman numeral XI
28-11-2008 in Roman numerals is XXVIII.XI.MMVIII