May 1990 Holidays
| Holidays May, 1990 | Week Day | Date |
| Cinco de Mayo | Saturday | May 5, 1990 |
| Mother's Day | Sunday | May 13, 1990 |
| National Maritime Day | Tuesday | May 22, 1990 |
| National Missing Children's Day | Friday | May 25, 1990 |
| Memorial Day | Monday | May 28, 1990 |
| Holidays May, 1990 | Week Day | Date |
| Cinco de Mayo | Saturday | May 5, 1990 |
| Mother's Day | Sunday | May 13, 1990 |
| National Maritime Day | Tuesday | May 22, 1990 |
| National Missing Children's Day | Friday | May 25, 1990 |
| Memorial Day | Monday | May 28, 1990 |