5 is simply written as V. 1990 is written as MCMXC (M = 1000, CM = 900 and XC = 90) so 05-05-1990 would be written as V.V.MCMXC
it is V II MCMXC
In todays notation of Roman numerals: VIII-V-MCMXC
In today's notation of Roman numerals it is: V-XXIV-MCMXCIV
III VII MV
5th October 1988 = V-X-MCMLXXXVIII
it is V II MCMXC
In todays notation of Roman numerals: VIII-V-MCMXC
In today's notation of Roman numerals it is: V-XXIV-MCMXCIV
III VII MV
5th October 1988 = V-X-MCMLXXXVIII
In today's terms 05-08-1990 converted into Roman numerals is V-VIII-MCMXC. But in the times of the Romans themselves they would have probably wrote this out as V-VIII-MDCCCCLXXXX which can be simplified to V-IIX-XMM in the same way that the Roman numerals IIII and VIIII (4 and 9) are simplified to IV and IX respectively.
In Roman Numerals: 05- V 01- I 1984- MCMLXXXIV
The date 12-05-1992 in Roman numerals would be XII.V.MCMXCII
05 01 1987 in Roman numerals is V.I.MCMLXXXVII.
The date 25-05-05 in Roman numerals is XXV.V.V and the date 25-05-2005 is XXV.V.MMV
V XV MCMXCII Answer is expressed in the format used in the question.
The date 25-05-2009 written in Roman numerals would be XXV.V.MMIX