It is normally only customery to dislpay years in roman numerals.
17 = XVII = 10 + 5 + 1 + 1
3 = III = 1 + 1 + 1
1991 = MCMXCI = 1000 + (1000 - 100) + (100 - 10) + 1
So 17/03/1991 = XVII / III / MCMXCI
The date 17-03-1989 in Roman numerals would be XVII.III.MCMLXXXIX
In todays modern formation of Roman numerals: I-XVII-MCMXCI Note that the ancient Romans would have wrote out the equivalent of 1991 differently to how we notate it today
The date 17-01-1986 in Roman Numerals would be XVII.I.MCMLXXXVI
The date 08-17-2006 in Roman numerals would be VIII.XVII.MMVI
The date 17-10-2006 in Roman numerals would be XVII.X.MMVI
The date 17-03-1989 in Roman numerals would be XVII.III.MCMLXXXIX
In todays modern formation of Roman numerals: I-XVII-MCMXCI Note that the ancient Romans would have wrote out the equivalent of 1991 differently to how we notate it today
The date 17-01-1986 in Roman Numerals would be XVII.I.MCMLXXXVI
The date 08-17-2006 in Roman numerals would be VIII.XVII.MMVI
The date 17-10-2006 in Roman numerals would be XVII.X.MMVI
Today's conventional conversion of 17-03-1983 into Roman numerals is XVII-III-MCMLXXXIII whether or not the Romans themselves did it that way is debatable.
17 - XVII XVII
The Roman numerals for March 17, 1976, are XVII III MCMLXXVI.
17 = XVII
17
The date 10-17-2009 can be represented by the Roman numerals X.XVII.MMIX
The date 17-04-2009 in Roman Numerals would be XVII.IV.MMIX