1) Jane's birthday is on the fifteenth of December
2) Mike's birthday is on the tenth of February
3) Mary's birthday is on the second of January
4) Alex's birthday is on the eighteenth of March
5) Nataly's birthday is on the twenty second of May
6) David's birthday is on the third of April
7) Nick's birthday is on the thirteen of June
8) Kate's birthday is on the thirty first of August
9) Julia's birthday is on the twenty seventh of July
10) Stacey's birthday is on the first of September
11) Fred's birthday is on the twenty ninth of November
12) Christina's birthday is on the fourth of October