May 1980 Holidays
| Holidays May, 1980 | Week Day | Date |
| Cinco de Mayo | Monday | May 5, 1980 |
| Mother's Day | Sunday | May 11, 1980 |
| National Maritime Day | Thursday | May 22, 1980 |
| National Missing Children's Day | Sunday | May 25, 1980 |
| Memorial Day | Monday | May 26, 1980 |
| Holidays May, 1980 | Week Day | Date |
| Cinco de Mayo | Monday | May 5, 1980 |
| Mother's Day | Sunday | May 11, 1980 |
| National Maritime Day | Thursday | May 22, 1980 |
| National Missing Children's Day | Sunday | May 25, 1980 |
| Memorial Day | Monday | May 26, 1980 |