Il numero romano MCMLXXIII nel sistema decimale vale: 1973.
MCMLXXIII in latino si scrive mille nongenti septuaginta tres,
mentre in italiano millenovecentosettantatré.
MCMLIV, MCMLV, MCMLVI, MCMLVII, MCMLVIII, MCMLIX, MCMLX, MCMLXI, MCMLXII, MCMLXIII, MCMLXIV, MCMLXV, MCMLXVI, MCMLXVII, MCMLXVIII, MCMLXIX, MCMLXX, MCMLXXI, MCMLXXII, MCMLXXIV, MCMLXXV, MCMLXXVI, MCMLXXVII, MCMLXXVIII, MCMLXXIX, MCMLXXX, MCMLXXXI, MCMLXXXII, MCMLXXXIII, MCMLXXXIV, MCMLXXXV, MCMLXXXVI, MCMLXXXVII, MCMLXXXVIII, MCMLXXXIX, MCMXC, MCMXCI, MCMXCII