May 1991 Holidays
| Holidays May, 1991 | Week Day | Date |
| Cinco de Mayo | Sunday | May 5, 1991 |
| Mother's Day | Sunday | May 12, 1991 |
| National Maritime Day | Wednesday | May 22, 1991 |
| National Missing Children's Day | Saturday | May 25, 1991 |
| Memorial Day | Monday | May 27, 1991 |
| Holidays May, 1991 | Week Day | Date |
| Cinco de Mayo | Sunday | May 5, 1991 |
| Mother's Day | Sunday | May 12, 1991 |
| National Maritime Day | Wednesday | May 22, 1991 |
| National Missing Children's Day | Saturday | May 25, 1991 |
| Memorial Day | Monday | May 27, 1991 |