Ответ:

Даты преобразованы в полную форму с порядковыми числительными:

  1. Amy’s birthday is on the fourth of July.
  2. Harry’s birthday is on the fifteenth of January.
  3. Diana’s birthday is on the twenty-third of August.
  4. Damian’s birthday is on the tenth of February.
  5. Paul’s birthday is on the third of May.
  6. Jack’s birthday is on the eighth of October.
  7. Stephanie’s birthday is on the twenty-first of April.
  8. Melanie’s birthday is on the fifth of November.