| September 2018 | |||
|---|---|---|---|
| Date | Day | Holiday | Where |
| September-1 | Saturday | Colonel Freeman McGilvery Day | Maine (Special Days) |
| September-1 | Saturday | Native American Day | Delaware (Special Days) |
| September-2 | Sunday | Queen Lili‘uokalani Day | Hawaii (Special Days) |
| September-3 | Monday | Labor Day | Federal (Federal Holidays) |
| September-3 | Monday | Labor Day | New York Stock Exchange (NYSE Holidays) |
| September-3 | 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-3 | Monday | Labor Day | US Banks (US Bank Holidays 2018) |
| September-3 | Monday | Labor Day | United States Postal Service (USPS Holidays) |
| September-4 | Tuesday | Marcus Whitman Day | Washington (Special Days) |
| September-8 | Saturday | Maine Youth Field and Stream Day | Maine (Special Days) |
| September-11 | Tuesday | Ohio public safety employee day | Ohio (Special Days) |
| September-11 | Tuesday | Patriots' Day | Hawaii (Special Days) |
| September-11 | Tuesday | September eleventh | South Carolina (Special Days) |
| September-11 | Tuesday | Texas First Responders Day | Texas (Special Days) |
| September-12 | Wednesday | Older Alaskans Day | Alaska (Special Days) |
| September-15 | Saturday | Landowner Recognition Day | Maine (Special Days) |
| September-15 | Saturday | Texian Navy Day | Texas (Special Days) |
| September-17 | Monday | Citizenship Day | Virginia (Special Days) |
| September-17 | Monday | Constitution Day | Nevada, Utah (Special Days) |
| September-19 | Wednesday | Dr. Hector P. Garcia Day | Texas (Special Days) |
| September-21 | Friday | Peace Day | Hawaii (Special Days) |
| September-21 | Friday | POW/MIA Recognition Day | Arkansas, South Carolina, South Dakota, Utah, Vermont (Special Days) |
| September-22 | Saturday | Native American Day | Kansas (Special Days) |
| September-23 | Sunday | Internet safety day | Ohio (Special Days) |
| September-27 | Thursday | First Responder Appreciation Day | Oregon (Special Days) |
| September-28 | Friday | American Indian Day | Texas (Special Days) |
| September-28 | Friday | Children's Day | Maine (Special Days) |
| September-28 | Friday | Native Americans Day | Nevada (Special Days) |
| September-30 | Sunday | Gold Star Family Day | Hawaii (Special Days) |
| September-30 | Sunday | Gold Star Mother's Day | North Dakota, Texas (Special Days) |