Nowadays it is officially MCMXC but in ancient Rome it probably was simply XMM (2000-10)
1990 = MCMXC
Roman Vlasov was born in 1990.
Roman Zenzinger died in 1990.
The date 18-06-1990 in Roman numerals would be XVIII.VI.MCMXC
"MCM" is 1990 in Roman. The rest of the date doesn't translate well as the Roman calendar is not the same as our own.
17th May, 1990 would be XVII. V. MCMCX in Roman numerals.
Roman Vishniac died on 1990-01-22.
Roman Hikō was created on 1990-04-08.
Roman Pyakshev was born on 1990-02-15.
Roman Putilin was born on 1990-12-04.
Roman Bezus was born on 1990-09-26.
Roman Valeš was born on 1990-03-06.