Question

31/07/1512 =The thrsty-first 20/01/1987 =the twentieth 21/06/1453 =the twenty-first 03/03/2002 =the third 11/11/2017 =the eleventh

Answer 1

the thirty first of July fifteen and twelve (sau: one thousand five hundred and twelve)
the twentieth of January nineteen eighty seven (sau: one thousand nine hundred and eighty seven)
the twenty first of June fourteen fifty three (sau: one thousand four hundred and fifty three)
the third of March two thousand and two
the eleventh of November two thousand and seventeen