Ten persons  -  A, B, C, D, E, F, G, H, I and J were born on either the 7th or 28th of January, March, June, September and December of the same year, but not necessarily in the same order.
B was born in a month of 30 days. 
H was born immediate after B and immediate before A. 
Neither H nor I was born in September.
|  |  | Case 1 | Case 2 | 
| Dates | Months | Persons | Persons | 
| 7th | January |  |  | 
| 28th |  |  |  | 
| 7th | March |  |  | 
| 28th |  |  |  | 
| 7th | June | B |  | 
| 28th |  | H |  | 
| 7th | September | A |  | 
| 28th |  |  | B | 
| 7th | December |  | H | 
| 28th |  |  | A | 
Three persons were born between D and H. 
Only two persons were born before C.
|  |  | Case 1 | Case 1a | Case 2 | 
| Dates | Months | Persons | Persons | Persons | 
| 7th | January |  |  |  | 
| 28th |  | D |  |  | 
| 7th | March | C | C | C | 
| 28th |  |  |  |  | 
| 7th | June | B | B | D | 
| 28th |  | H | H |  | 
| 7th | September | A | A |  | 
| 28th |  |  |  | B | 
| 7th | December |  |  | H | 
| 28th |  |  | D | A | 
Two persons were born between I and D. Thus, case 1 and case 1a are invalid. 
|  |  | Case 2 | 
| Dates | Months | Persons | 
| 7th | January |  | 
| 28th |  | I | 
| 7th | March | C | 
| 28th |  |  | 
| 7th | June | D | 
| 28th |  |  | 
| 7th | September |  | 
| 28th |  | B | 
| 7th | December | H | 
| 28th |  | A | 
F, who was born on an odd-numbered date, was born immediate after G. 
J was born in January.
|  |  | Case 2 | 
| Dates | Months | Persons | 
| 7th | January | J | 
| 28th |  | I | 
| 7th | March | C | 
| 28th |  |  | 
| 7th | June | D | 
| 28th |  | G | 
| 7th | September | F | 
| 28th |  | B | 
| 7th | December | H | 
| 28th |  | A | 
Therefore, the final arrangement is:
| Dates | Months | Persons | 
| 7th | January | J | 
| 28th |  | I | 
| 7th | March | C | 
| 28th |  | E | 
| 7th | June | D | 
| 28th |  | G | 
| 7th | September | F | 
| 28th |  | B | 
| 7th | December | H | 
| 28th |  | A | 
E was born on the 28th March. E was born immediate after C.