XXVIII. XI. MDCCCCLXXXV or IIXXX. XI. VXMM
16-11-1991 in Roman numerals would be XVI.XI.MCMXCI
In today's notation of Roman numerals: VII-XI-MCMLXXXIX
11 August 1979 can also be written as 11-08-1979 which in Roman numerals would be XI.VIII.MCMLXXIX
The date 09-11-06 can be written in Roman numerals as IX.XI.VI. The full date 09-11-2006 would be IX.XI.MMVI
XI-X-MCMXCIV
16-11-1991 in Roman numerals would be XVI.XI.MCMXCI
IV.XI.MCMLXXXV
In today's notation of Roman numerals: VII-XI-MCMLXXXIX
11 August 1979 can also be written as 11-08-1979 which in Roman numerals would be XI.VIII.MCMLXXIX
V-XI-MCMLXXXV
The date 09-11-06 can be written in Roman numerals as IX.XI.VI. The full date 09-11-2006 would be IX.XI.MMVI
XI - IV - MCMLXXXIX
XI-X-MCMXCIV
11 is XI 6 is VI 1990 is MCMXC
In capital letters: III-XI-MCMLXXXV
The number 11 is written as XI in roman numerals.
You could write that as XI X MCMLXXXIV