It is: I-XVIII-MMX
In today's modern terms: January-XVIII-MCMXCI and also I-XVIII-MCMXCI
The M represents 1000 and Janauary would be I. This would convert to I.XVIII.MMXIV.
January 18th, 1991 in roman numerals would be: I/XVIII/MCMXCI
It is: XVIII-IX-MMXII
IX-XVIII-MMX
In today's modern terms: January-XVIII-MCMXCI and also I-XVIII-MCMXCI
The M represents 1000 and Janauary would be I. This would convert to I.XVIII.MMXIV.
January 18th, 1991 in roman numerals would be: I/XVIII/MCMXCI
It is: VIII-XVIII-MMX
IX-XVIII-MMX
It is: XVIII-IX-MMXII
XVIII-XI-MMX
XI-XVIII-MMX
It is: X-XVIII-MMX
18 written in Roman numerals is XVIII.
18 - XVIII
The date 18-06-1990 in Roman numerals would be XVIII.VI.MCMXC