| Elizabeth and Philip birthday |
 |
| 1991 | Repubblica di Mauritius |
|
| Birthdays of Queen Elizabeth II and Philip |
 |
| 1991 | Repubblica di Vanuatu |
|
| Birthdays of Queen Elizabeth II and Philip |
 |
| 1991 | Repubblica di Vanuatu |
|
| Birthdays of Queen Elizabeth II and Philip |
 |
| 1991 | Saint Kitts |
|
| Birthdays of Queen Elizabeth II and Philip |
|
| 1991 | Saint Kitts |
|
| Birthdays of Queen Elizabeth II and Philip |
 |
| 1991 | Sant'Elena |
|
| Birthdays of Queen Elizabeth II and Philip |
|
| 1991 | Sant'Elena |
|
| September 1 Revolution |
 |
| 1991 | Stato della Libia |
|
| September 1 Revolution |
 |
| 1991 | Stato della Libia |
|
| Birthdays of Queen Elizabeth II and Philip |
 |
| 1991 | Stato indipendente di Samoa |
|
| Birthdays of Queen Elizabeth II and Philip |
|
| 1991 | Stato indipendente di Samoa |
|
