May 1981 Holidays
| Holidays May, 1981 | Week Day | Date |
| Cinco de Mayo | Tuesday | May 5, 1981 |
| Mother's Day | Sunday | May 10, 1981 |
| National Maritime Day | Friday | May 22, 1981 |
| Memorial Day | Monday | May 25, 1981 |
| National Missing Children's Day | Monday | May 25, 1981 |
| Holidays May, 1981 | Week Day | Date |
| Cinco de Mayo | Tuesday | May 5, 1981 |
| Mother's Day | Sunday | May 10, 1981 |
| National Maritime Day | Friday | May 22, 1981 |
| Memorial Day | Monday | May 25, 1981 |
| National Missing Children's Day | Monday | May 25, 1981 |