| April 2021 | ||
|---|---|---|
| Date | Holiday | Where |
| April-2, Friday | Good Friday | Arkansas (Memorial Days) |
| April-2, Friday | Good Friday | New York Stock Exchange (NYSE Holidays 2021) |
| April-2, Friday | Good Friday | Connecticut, Delaware, Hawaii, Indiana, Louisiana, New Jersey, North Carolina, North Dakota, Tennessee (Public Holidays) |
| April-2, Friday | Pascua Florida Day | Florida (Designated Days) |
| April-3, Saturday | Confederate Flag Day | Arkansas (Memorial Days) |
| April-4, Sunday | Parents' and Children's Day | Florida (Designated Days) |
| April-5, Monday | Gift to Iowa's Future Recognition Day | Iowa (Designated Days) |
| April-7, Wednesday | Everglades Day | Florida (Designated Days) |
| April-8, Thursday | Buddha Day | Hawaii (Designated Days) |
| April-9, Friday | Former Prisoners of War Recognition Day | Georgia (Designated Days) |
| April-9, Friday | Prisoners of War and Missing in Action Recognition Days | Alaska (Designated Days) |
| April-9, Friday | Prisoners of War Remembrance Day | Arkansas (Memorial Days) |
| April-9, Friday | Prisoners of war remembrance day | Arizona (Observed Days) |
| April-10, Saturday | Dolores Huerta Day | California (Designated Days) |
| April-14, Wednesday | Pan-American Day | Florida (Designated Days) |
| April-16, Friday | Arbor Day | Colorado (Designated Days) |
| April-19, Monday | Patriot's Day | Maine, Massachusetts (Public Holidays) |
| April-19, Monday | Patriots' Day | Florida (Designated Days) |
| April-19, Monday | Patriots' Day | Arkansas (Memorial Days) |
| April-20, Tuesday | Bob Bartlett Day | Alaska (Designated Days) |
| April-21, Wednesday | John Muir Day | California (Designated Days) |
| April-22, Thursday | Spring Cleanup Day | Idaho (Designated Days) |
| April-24, Saturday | California Day of Remembrance of the Armenian Genocide | California (Designated Days) |
| April-26, Monday | Arkansas Bird Day | Arkansas (Memorial Days) |
| April-26, Monday | Confederate Memorial Day | Alabama, Mississippi (Public Holidays) |
| April-30, Friday | Arbor and Bird Day | Illinois (Designated Days) |
| April-30, Friday | Arbor Day | Iowa, Kansas (Designated Days) |
| April-30, Friday | Arbor day | Arizona (Observed Days) |
| April-30, Friday | Arbor Day | Nebraska (Public Holidays) |
| April-30, Friday | Arbor Day | Delaware (Special Days) |
| April-30, Friday | Children's day | Idaho (Designated Days) |