| September 2017 | |||
|---|---|---|---|
| Date | Day | Holiday | Where |
| September-2 | Saturday | Colonel Freeman McGilvery Day | Maine (Designated Days) |
| September-2 | Saturday | Native American Day | Delaware (Special Days) |
| September-2 | Saturday | Queen Lili‘uokalani Day | Hawaii (Designated Days) |
| September-4 | Monday | Labor Day | Federal, New York Stock Exchange, United States Postal Service, US Banks |
| September-4 | Monday | Labor Day | Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, 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 Mexico, 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) |
| September-4 | Monday | Marcus Whitman Day | Washington (Recognized Days) |
| September-9 | Saturday | Admission Day | California (Designated Days) |
| September-9 | Saturday | Maine Youth Field and Stream Day | Maine (Designated Days) |
| September-9 | Saturday | Utah State Flag Day | Utah (Commemorative Days) |
| September-10 | Sunday | Toms River East Little League World Champions Day | New Jersey (Observed Days) |
| September-10 | Sunday | Firefighter Day of Remembrance | New Mexico (Designated Days) |
| September-10 | Sunday | Grandparent's Day | New Jersey (Observed Days) |
| September-11 | Monday | 9/11 First Responders Day | Kentucky (Designated Days) |
| September-11 | Monday | Emergency Personnel Appreciation Day | Missouri (Designated Days) |
| September-11 | Monday | Emergency Services Day | Missouri (Designated Days) |
| September-11 | Monday | Family Day | New Mexico (Designated Days) |
| September-11 | Monday | Firefighterfficers' Apprs' and Police Oeciation Day | Rhode Island (Special Days) |
| September-11 | Monday | Florida Missing Children's Day | Florida (Designated Days) |
| September-11 | Monday | Ohio Public Safety Employee Day | Ohio (Designated Days) |
| September-11 | Monday | Patriots' Day | Hawaii (Designated Days) |
| September-11 | Monday | Texas First Responders Day | Texas (Recognition Days) |
| September-13 | Wednesday | Commodore John Barry Day | Pennsylvania (Designated Days) |
| September-14 | Thursday | National Anthem Day | Pennsylvania (Designated Days) |
| September-15 | Friday | National POW/MIA Recognition Day | Oregon (Commenrations Days) |
| September-15 | Friday | POW/MIA Recognition Day | Utah (Commemorative Days) |
| September-15 | Friday | POW/MIA Recognition Day | Maine, Missouri, Pennsylvania (Designated Days) |
| September-15 | Friday | POW/MIA Recognition Day | Arkansas (Memorial Days) |
| September-15 | Friday | POW/MIA Recognition Day | New Jersey, Oklahoma, Vermont (Observed Days) |
| September-15 | Friday | POW/MIA Recognition Day | Rhode Island, South Carolina, South Dakota, Virginia (Special Days) |
| September-16 | Saturday | American Legion Day | Minnesota (Designated Days) |
| September-16 | Saturday | Landowner Recognition Day | Maine (Designated Days) |
| September-16 | Saturday | Texian Navy Day | Texas (Recognition Days) |
| September-17 | Sunday | Citizenship Day | Virginia (Special Days) |
| September-17 | Sunday | Constitution Day | Utah (Commemorative Days) |
| September-17 | Sunday | Constitution Day | California, Tennessee (Designated Days) |
| September-17 | Sunday | Constitution Day | Arizona, Nevada (Observed Days) |
| September-17 | Sunday | Constitution Day | Idaho (Special Days) |
| September-20 | Wednesday | Dr. Hector P. Garcia Day | Texas (Recognition Days) |
| September-21 | Thursday | Peace Day | Hawaii (Designated Days) |
| September-22 | Friday | Freedom Walk Day | New Jersey (Observed Days) |
| September-22 | Friday | Michigan Indian day | Michigan (Special Days) |
| September-22 | Friday | Native Americans Day | California (Designated Days) |
| September-23 | Saturday | Native Americans Day | Kansas (Commemoration day) |
| September-23 | Saturday | Native Americans Day | Nevada (Observed Days) |
| September-24 | Sunday | Adoption Day | Ohio (Designated Days) |
| September-24 | Sunday | American Indian Heritage Day | Rhode Island (Special Days) |
| September-24 | Sunday | Gold Star Family Day | Hawaii (Designated Days) |
| September-24 | Sunday | Gold Star Mother's Day | North Dakota, Tennessee (Designated Days) |
| September-24 | Sunday | Gold Star Mother's Day | New Jersey (Observed Days) |
| September-24 | Sunday | Internet Safety Day | Ohio (Designated Days) |
| September-24 | Sunday | Native Americans Day | New Jersey (Observed Days) |
| September-25 | Monday | American Indian Day | Tennessee (Designated Days) |
| September-25 | Monday | American Indian Day | Nebraska (Observed Days) |
| September-25 | Monday | Ataxia Awareness Day | Rhode Island (Special Days) |
| September-26 | Tuesday | Mesothelioma Awareness Day | Kentucky (Designated Days) |
| September-27 | Wednesday | Arizona first responders' day of gratitude and remembrance | Arizona (Observed Days) |
| September-27 | Wednesday | First Responder Appreciation Day | Oregon (Commenrations Days) |
| September-28 | Thursday | Cabrillo Day | California (Designated Days) |
| September-29 | Friday | American Indian Day | Texas (Recognition Days) |
| September-29 | Friday | American Indian Day | Montana (Special Days) |
| September-29 | Friday | Children's Day | Maine (Designated Days) |
| September-29 | Friday | Yom Kippur | North Carolina (Special Days) |