| May 2021 | ||
|---|---|---|
| Date | Holiday | Where |
| May-1, Saturday | Family Day and Family Preservation Month | Alaska (Designated Days) |
| May-1, Saturday | Law Day | Florida (Designated Days) |
| May-1, Saturday | Lei Day | Hawaii (Designated Days) |
| May-2, Sunday | Chaplains Day | Illinois (Designated Days) |
| May-3, Monday | Hemophilia Awareness Day | Arkansas (Memorial Days) |
| May-4, Tuesday | Alaska Agriculture Day | Alaska (Designated Days) |
| May-6, Thursday | Alaska Day of Prayer | Alaska (Designated Days) |
| May-6, Thursday | Day of Prayer in Illinois | Illinois (Designated Days) |
| May-7, Friday | Military Spouse Appreciation Day | Delaware (Special Days) |
| May-7, Friday | Space Day | California (Designated Days) |
| May-8, Saturday | Truman Day | Missouri (Public Holidays) |
| May-9, Sunday | Mother's Day | Iowa, Kansas (Designated Days) |
| May-9, Sunday | Mothers Day | Idaho, Illinois (Designated Days) |
| May-10, Monday | Child Welfare Professionals Recognition Day | Florida (Designated Days) |
| May-10, Monday | Confederate Memorial Day | South Carolina (Public Holidays) |
| May-10, Monday | Saint Damien de Veuster Day | Hawaii (Designated Days) |
| May-15, Saturday | Law Enforcement Memorial Day | Florida (Designated Days) |
| May-15, Saturday | Peace Officer Memorial Day | Georgia (Designated Days) |
| May-15, Saturday | Public lands day | Colorado (Designated Days) |
| May-16, Sunday | Citizenship Day | Illinois (Designated Days) |
| May-16, Sunday | Senior Citizens Day | Illinois (Designated Days) |
| May-17, Monday | National Idaho Day | Idaho (Designated Days) |
| May-21, Friday | Teacher's Day | Florida (Designated Days) |
| May-22, Saturday | Harvey Milk Day | California (Designated Days) |
| May-31, Monday | Memorial Day | New York Stock Exchange (NYSE Holidays 2021) |
| May-31, Monday | Memorial Day | Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Federal, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming (Public Holidays) |
| May-31, Monday | Memorial Day | US Banks (US Bank Holidays 2021) |
| May-31, Monday | Memorial Day | United States Postal Service (USPS Holidays 2021) |