National Days in September include Labor Day, Patriot Day, Constitution Day, National Grandparents Day, International Day of Peace, and National Coffee Day.
September arrives as a month anchored by civic remembrance, national heritage, and the turn of the seasons.
Observed across the United States, Labor Day and Patriot Day open the month with rest and remembrance, while Constitution Day, National Grandparents Day and Gold Star Mother’s Day carry the weight of federal statute behind them.
Global advocacy runs just as strong, from the International Day of Peace and International Literacy Day to the International Day for the Preservation of the Ozone Layer and the International Day for the Total Elimination of Nuclear Weapons.
Alongside these civic and international themes, September holds the largest concentration of weekend-rule observances in the calendar year.
It opens with the Labor Day weekend, shifts into a dense middle stretch built around National Hispanic Heritage Month and Constitution Week, and closes with the single busiest date of the month.
Food and pop culture fill the gaps, with National Cheeseburger Day, National Pancake Day, National Coffee Day, Talk Like a Pirate Day and Star Trek Day all landing in the month.
September 2027 has one federal holiday and more moveable-date observances than any other month. Twenty-six or more shift annually, and four are chained directly to Labor Day, which falls early in 2027 on September 6.
That early Labor Day produces two collisions worth knowing about in advance. Carl Garner Federal Lands Cleanup Day lands on Patriot Day, and National POW/MIA Recognition Day lands on Constitution Day.
Both are statutory observances sharing a date with another statutory observance, and no published calendar flags it.
Table of Contents
National days in September 2027
| Date | Day | National & International Days Observed |
|---|---|---|
| September 1 | Wednesday | National Forgiveness Day, National Burnt Ends Day, National Chicken Boy Day, National No Rhyme (Nor Reason) Day, National Hotel Employee Day, National Acne Positivity Day |
| September 2 | Thursday | National V-J Day, World Coconut Day, National Blueberry Popsicle Day, Calendar Adjustment Day |
| September 3 | Friday | National Skyscraper Day, U.S. Bowling League Day, National Food Bank Day (first Friday), National Chianti Day (first Friday), National Lazy Mom’s Day (first Friday), National College Colors Day, National Welsh Rarebit Day, Merchant Navy Day (UK) |
| September 4 | Saturday | National Wildlife Day, National Hummingbird Day (first Saturday), National Tailgating Day (first Saturday), National Play Outside Day, National Macadamia Nut Day, National Newspaper Carrier Day, National Spice Blend Day |
| September 5 | Sunday | International Day of Charity, National Cheese Pizza Day, National Pastor’s Spouses Day (first Sunday), National Be Late For Something Day |
| September 6 | Monday | Labor Day (first Monday), National Read a Book Day, National Coffee Ice Cream Day |
| September 7 | Tuesday | International Day of Clean Air for Blue Skies, National Beer Lover’s Day, National Another Look Unlimited Day (day after Labor Day), National Salami Day, National Acorn Squash Day, National Grandma Moses Day, National New Hampshire Day |
| September 8 | Wednesday | International Literacy Day, Star Trek Day, World Ampersand Day, National Pediatric Hematology/Oncology Nurses Day |
| September 9 | Thursday | National Teddy Bear Day, International Day to Protect Education from Attack, National School Picture Day (second Thursday), Care Bears Share Your Care Day, National Wiener Schnitzel Day, National Grilled Chicken Day |
| September 10 | Friday | World Suicide Prevention Day, National TV Dinner Day, National Swap Ideas Day |
| September 11 | Saturday | Patriot Day and National Day of Service and Remembrance, Carl Garner Federal Lands Cleanup Day (first Saturday after Labor Day), National Hot Cross Bun Day, National Make Your Bed Day |
| September 12 | Sunday | National Grandparents Day (first Sunday after Labor Day), National Video Games Day, National Pet Memorial Day (second Sunday), National Hug Your Hound Day (second Sunday), National Day of Encouragement, National Chocolate Milkshake Day, National Hug & High 5 Day, National Report Medicare Fraud Day |
| September 13 | Monday | Day of the Programmer (256th day of the year), National Boss/Employee Exchange Day (Monday after Labor Day), National Peanut Day, Uncle Sam Day, Positive Thinking Day, National Bald Is Beautiful Day, National Celiac Disease Awareness Day |
| September 14 | Tuesday | National Sober Day, National Ants on a Log Day (second Tuesday), National Cream-Filled Donut Day, National Eat a Hoagie Day, National Live Creative Day, National Parents Day Off, National Virginia Day |
| September 15 | Wednesday | National Hispanic Heritage Month begins, International Day of Democracy, National Double Cheeseburger Day, National Linguine Day, National Online Learning Day, National Cheese Toast Day, National Neonatal Nurses Day, National Felt Hat Day |
| September 16 | Thursday | International Day for the Preservation of the Ozone Layer, National Guacamole Day, National Pawpaw Day (third Thursday), National Play-Doh Day, Mayflower Day, National Stepfamily Day, National Working Parents Day |
| September 17 | Friday | Constitution Day and Citizenship Day, Constitution Week begins, National POW/MIA Recognition Day (third Friday), World Patient Safety Day, National Tradesmen Day (third Friday), National Monte Cristo Day, National Apple Dumpling Day |
| September 18 | Saturday | Air Force Birthday, National Cheeseburger Day, National Dance Day (third Saturday), National Cleanup Day (third Saturday), National Gymnastics Day (third Saturday), Responsible Dog Ownership Day (third Saturday), Puppy Mill Awareness Day, Boys’ and Girls’ Club Day for Kids, International Equal Pay Day |
| September 19 | Sunday | Talk Like a Pirate Day, Wife Appreciation Day (third Sunday), National Butterscotch Pudding Day, National Love Your Lunch Day |
| September 20 | Monday | World Cleanup Day, National Pepperoni Pizza Day, National Fried Rice Day, National Punch Day, National String Cheese Day, National Care for Kids Day |
| September 21 | Tuesday | International Day of Peace, World Alzheimer’s Day, National Voter Registration Day (third Tuesday), National IT Professionals Day (third Tuesday), National Chai Day, National New York Day, Earth, Wind & Fire Day, National Pecan Cookie Day |
| September 22 | Wednesday | American Business Women’s Day, Hobbit Day, National Elephant Appreciation Day, Car Free Day, National Ice Cream Cone Day, National Centenarian’s Day, National White Chocolate Day, Dear Diary Day, National States and Capitals Day |
| September 23 | Thursday | Autumnal Equinox, International Day of Sign Languages, Celebrate Bisexuality Day, National Checkers Day and Dogs in Politics Day, Restless Legs Awareness Day, Teal Talk Day, National Great American Pot Pie Day |
| September 24 | Friday | Innergize Day (day after the equinox), National Brave Day (fourth Friday), National Punctuation Day, National Cherries Jubilee Day |
| September 25 | Saturday | National Public Lands Day (fourth Saturday), National Hunting and Fishing Day (fourth Saturday), National Ghost Hunting Day (last Saturday), Save Your Photos Day (last Saturday), National Family Health and Fitness Day USA (last Saturday), National Seat Check Saturday, National Singles Day, National Daughter’s Day, National Comic Book Day, National Quesadilla Day, National Lobster Day, National One-Hit Wonder Day, Math Storytelling Day |
| September 26 | Sunday | Gold Star Mother’s Day (last Sunday), International Daughters Day (fourth Sunday), International Day for the Total Elimination of Nuclear Weapons, National Pancake Day, National Dumpling Day, National Johnny Appleseed Day, National Compliance Officer Day, National Shamu the Whale Day |
| September 27 | Monday | World Tourism Day, National Gay Men’s HIV/AIDS Awareness Day, National Family Day (fourth Monday), National Chocolate Milk Day, National Crush a Can Day, National Corned Beef Hash Day, National Scarf Day, National Day of Forgiveness |
| September 28 | Tuesday | International Day for Universal Access to Information, National Good Neighbor Day, National Drink Beer Day, National North Carolina Day, National Strawberry Cream Pie Day |
| September 29 | Wednesday | National Coffee Day, World Heart Day, International Day of Awareness of Food Loss and Waste, National Women’s Health and Fitness Day (last Wednesday), World Dense Breast Day (last Wednesday), National VFW Day, Urban National Wildlife Refuge Day |
| September 30 | Thursday | International Translation Day, World Maritime Day (last Thursday), Orange Shirt Day, National Chewing Gum Day, National Hot Mulled Cider Day, National AI in Work Day, National Love People Day |
Here is the complete day-by-day guide to the key national and international days celebrated across September 2027.
September 1: National Forgiveness Day / National Burnt Ends Day
Opens the month with an invitation to release grudges and repair relationships, a theme September returns to on the 27th with National Day of Forgiveness. It also honors burnt ends, the caramelized point cuts of brisket that began as free scraps in Kansas City barbecue joints.
September 2: National V-J Day / World Coconut Day
Marks the formal Japanese surrender aboard the USS Missouri in Tokyo Bay on September 2, 1945, ending the Second World War. Globally, World Coconut Day highlights the economic importance of coconut farming across Asia and the Pacific.
September 3: National Skyscraper Day / National Food Bank Day (First Friday)
Celebrates vertical architecture on the birthday of Louis Sullivan, the Chicago architect widely called the father of the skyscraper. The first Friday brings National Food Bank Day, timed to the start of the school year when demand on food pantries rises.
September 4: National Wildlife Day / National Hummingbird Day (First Saturday)
Draws attention to endangered species, wildlife rescue and the role of zoos and sanctuaries in conservation breeding. National Hummingbird Day arrives as the birds begin their southward migration across North America.
September 5: International Day of Charity / National Cheese Pizza Day
Designated by the United Nations on the anniversary of Mother Teresa’s death to encourage charitable giving and volunteerism worldwide. Domestically, the day belongs to the plain cheese pizza, the baseline against which every other pie is judged.
September 6: Labor Day (First Monday) / National Read a Book Day
The only federal holiday in September, honoring the American labor movement and the workers who built the country’s prosperity. Banks, post offices, federal offices and most schools close. September 6 is the second-earliest date Labor Day can occupy.
September 7: International Day of Clean Air for Blue Skies / National Beer Lover’s Day
The United Nations marks this date for air quality and the health burden of air pollution, which contributes to millions of premature deaths each year. In the United States, beer lovers get the day after Labor Day to themselves.
September 8: International Literacy Day / Star Trek Day
Proclaimed by UNESCO in 1966 to highlight global literacy rates and the roughly 750 million adults who cannot read. Star Trek Day marks the 1966 broadcast of the original series premiere, “The Man Trap,” on the very same date.
September 9: National Teddy Bear Day / National School Picture Day (Second Thursday)
Honors the stuffed bear named for President Theodore Roosevelt, who refused to shoot a captive bear on a 1902 Mississippi hunting trip, a story that became a political cartoon and then a toy. The second Thursday also brings school picture day for millions of students.
September 10: World Suicide Prevention Day / National TV Dinner Day
Organized by the International Association for Suicide Prevention with the World Health Organization to promote awareness, connection and access to support. National TV Dinner Day marks the frozen aluminum tray meal that Swanson launched in 1953.
September 11: Patriot Day / Carl Garner Federal Lands Cleanup Day (First Saturday after Labor Day)
Patriot Day, designated by 36 U.S.C. § 144, honors the nearly 3,000 people killed in the terrorist attacks of September 11, 2001, with flags at half-staff and a nationwide moment of silence. In 2027 it shares the date with Carl Garner Federal Lands Cleanup Day, a statutory volunteer cleanup day that only coincides with Patriot Day when Labor Day falls on September 6.
September 12: National Grandparents Day / National Video Games Day
Established by 36 U.S.C. § 125 as the first Sunday in September after Labor Day, following a campaign by West Virginia housewife Marian McQuade to honor the elderly. National Video Games Day celebrates the medium on a fixed September 12 date.
September 13: Day of the Programmer / National Boss/Employee Exchange Day
Day of the Programmer falls on the 256th day of the year, 256 being the number of values in an eight-bit byte. The Monday after Labor Day invites bosses and staff to swap roles for a day.
September 14: National Sober Day / National Ants on a Log Day (Second Tuesday)
Raises awareness of substance use recovery and the sober-curious movement, sitting inside National Recovery Month. National Ants on a Log Day celebrates the celery, peanut butter and raisin snack that generations of American children made in school.
September 15: National Hispanic Heritage Month Begins / International Day of Democracy
National Hispanic Heritage Month runs September 15 to October 15 under 36 U.S.C. § 126, opening on the independence anniversaries of Costa Rica, El Salvador, Guatemala, Honduras and Nicaragua. The United Nations marks the same date for democratic participation and civic freedom.
September 16: International Day for the Preservation of the Ozone Layer / National Guacamole Day
Commemorates the 1987 signing of the Montreal Protocol, the treaty that phased out ozone-depleting substances and is widely regarded as the most successful environmental agreement ever concluded. National Guacamole Day celebrates the avocado dip of Aztec origin.
September 17: Constitution Day / National POW/MIA Recognition Day (Third Friday)
Constitution Day and Citizenship Day commemorates the signing of the United States Constitution on September 17, 1787, and federal law requires every school receiving federal funds to hold a Constitution program on the date. In 2027 it coincides with National POW/MIA Recognition Day, which honors American prisoners of war and the more than 80,000 service members still unaccounted for.
September 18: Air Force Birthday / National Dance Day (Third Saturday)
Marks the founding of the U.S. Air Force as an independent service in 1947 under the National Security Act. The third Saturday carries National Dance Day, National Cleanup Day, National Gymnastics Day and Responsible Dog Ownership Day, making it one of the densest weekend dates of the month.
September 19: Talk Like a Pirate Day / Wife Appreciation Day (Third Sunday)
A comedic observance invented by two friends in Oregon in 1995 that spread globally on the strength of a single newspaper column. Wife Appreciation Day encourages husbands to recognize their partners with a gesture, a meal out or a day off from household work.
September 20: World Cleanup Day / National Pepperoni Pizza Day
Mobilizes millions of volunteers across nearly 200 countries to collect waste from streets, beaches and waterways. The United Nations fixed the date at September 20, though the organizing network has historically run it on the third Saturday.
September 21: International Day of Peace / World Alzheimer’s Day
Established by the United Nations General Assembly, which fixed the date in 2001 and calls for a global ceasefire and a minute of silence at noon in every time zone. World Alzheimer’s Day anchors World Alzheimer’s Month and focuses attention on dementia diagnosis and stigma.
September 22: American Business Women’s Day / Hobbit Day
Marks the 1949 founding of the American Business Women’s Association in Kansas City. Hobbit Day celebrates the shared birthday of Bilbo and Frodo Baggins in Tolkien’s calendar. Note that unlike 2026, the equinox does not fall on September 22 in 2027 across most of the country.
September 23: Autumnal Equinox / International Day of Sign Languages
Astronomical autumn begins in the Northern Hemisphere at 06:01 UTC, which is 2:01 a.m. EDT. The United Nations marks the same date for the roughly 300 sign languages used by 70 million deaf people worldwide, affirming sign language as equal in status to spoken language.
September 24: Innergize Day / National Punctuation Day
Innergize Day, always the day after the equinox, encourages rest and personal renewal heading into the darker half of the year. National Punctuation Day makes a lighthearted case for the comma, semicolon and apostrophe.
September 25: National Public Lands Day / National Daughter’s Day
The largest single-day volunteer effort for public lands in the United States, coordinated by the National Environmental Education Foundation since 1994. September 25 is the busiest date of the month in 2027, absorbing every fourth-Saturday and last-Saturday rule at once alongside National Daughter’s Day and National Comic Book Day.
September 26: Gold Star Mother’s Day / International Day for the Total Elimination of Nuclear Weapons
Designated by 36 U.S.C. § 111 as the last Sunday in September to honor mothers who have lost a child in military service, dating to a 1936 joint resolution of Congress. The United Nations marks the same date for nuclear disarmament, and International Daughters Day also falls here as the fourth Sunday.
September 27: World Tourism Day / National Family Day (Fourth Monday)
Marks the 1970 adoption of the UN World Tourism Organization statutes and the economic weight of travel in developing economies. National Family Day promotes family meals and the protective effect of regular time together, particularly for adolescents.
September 28: International Day for Universal Access to Information / National Good Neighbor Day
Recognizes the right to seek and receive information and the freedom-of-information laws that underpin it. National Good Neighbor Day, originated in Montana in the 1970s, encourages small acts of kindness toward the people next door.
September 29: National Coffee Day / World Heart Day
One of the most commercially active food holidays of the year, with free-cup promotions across major chains. World Heart Day, run by the World Heart Federation, focuses on cardiovascular disease, still the leading cause of death worldwide.
September 30: International Translation Day / World Maritime Day (Last Thursday)
Observed on the feast of St. Jerome, translator of the Bible into Latin, to recognize translators and interpreters in cross-cultural communication. World Maritime Day recognizes the shipping industry and the seafarers who move roughly 90 percent of world trade.
Month-Long September Observances
| Observance | Founding Organization / Originator | Year Established | Purpose & Context |
|---|---|---|---|
| National Hispanic Heritage Month | US Congress (Pub. L. 90-498, extended by Pub. L. 100-402) | 1968, extended 1988 | The only statutory September observance period. Runs September 15 to October 15, opening on five Central American independence anniversaries. |
| National Preparedness Month | FEMA Ready Campaign, Department of Homeland Security | 2004 | Promotes emergency kits, family plans and disaster readiness, with a theme announced annually. |
| National Recovery Month | SAMHSA, now led by Faces & Voices of Recovery | 1989 | Celebrates recovery from substance use and mental health conditions and the treatment workforce behind it. |
| National Suicide Prevention Month | Public health bodies and advocacy organizations | ~1970s | Focuses on awareness, connection and access to crisis support, anchored by World Suicide Prevention Day on September 10. |
| Childhood Cancer Awareness Month | Pediatric oncology advocacy groups | ~1990s | Raises funds and awareness for childhood cancer research, symbolized by the gold ribbon. |
| World Alzheimer’s Month | Alzheimer’s Disease International | 2012 | Extends World Alzheimer’s Day on September 21 into a month of dementia awareness and anti-stigma campaigning. |
| National Library Card Sign-up Month | American Library Association | 1987 | Launched with the US Secretary of Education to get a library card into every student’s hands. |
| Self-Improvement Month | Aggregator and media originated | — | Frames the post-summer reset as a second January for habits and personal goals. |
| National Chicken Month | National Chicken Council | ~1990s | Trade-association promotion tied to the end of grilling season. |
| National Potato Month, National Mushroom Month | Produce trade associations | — | Commodity marketing months timed to the autumn harvest. |
September 2027 carries a federal holiday, an equinox, a statutory month, a statutory week, and the densest cluster of weekday-rule observances in the calendar.
Only Labor Day closes anything. Patriot Day, Constitution Day and Gold Star Mother’s Day are commemorative observances that request flag displays and ceremonies but create no day off.
The equinox is worth a note, and 2027 is cleaner than 2026. It falls at 06:01 UTC on September 23, which puts it on the 23rd for the United Kingdom, Europe, West Africa and every US time zone from the Rockies eastward.
Only the Pacific coast, Alaska and Hawaii see it on the evening of September 22. The previous year had the split running between America and Europe; in 2027 it runs inside the United States.
There are no Jewish High Holidays in September 2027. Because Hebrew year 5787 is a leap year carrying an intercalary month, Rosh Hashanah 5788 begins at sundown on Friday, October 1, with the first day falling on Saturday, October 2.
This is the latest end of the range, and it strips September 2027 of dates that normally anchor the month.
One more quirk sits at the end. September 2027 has exactly four Saturdays, so “fourth Saturday” and “last Saturday” both resolve to September 25 and the distinction disappears.
In September 2028, which has five, National Public Lands Day falls on the 23rd while National Ghost Hunting Day and Save Your Photos Day fall on the 30th, a full week apart.
The statutory September day almost nobody lists
Carl Garner Federal Lands Cleanup Day is designated by 36 U.S.C. § 104 as the first Saturday after Labor Day, which makes it September 11 in 2027.
It appears on no major published September list, including the one that describes itself as the official source for national days.
There is an act of Congress behind it. Public Law 99-402 created it in 1986, Public Law 104-333 amended it in 1996, and it sits in the same chapter of the United States Code as Constitution Day and Gold Star Mother’s Day.
In 2027 the omission is compounded, because the day shares its date with Patriot Day. A statutory cleanup observance is invisible on a date already carrying a national day of remembrance.
Both errors come from the same habit of copying lists rather than checking sources.
Floating Observances in September 2027
| Observance | Rule | 2027 Date |
|---|---|---|
| National Food Bank Day, National Chianti Day, National Lazy Mom’s Day | First Friday | September 3 |
| National Hummingbird Day, National Tailgating Day | First Saturday | September 4 |
| National Pastor’s Spouses Day | First Sunday | September 5 |
| Labor Day | First Monday | September 6 |
| National Another Look Unlimited Day | Day after Labor Day | September 7 |
| National School Picture Day | Second Thursday | September 9 |
| Carl Garner Federal Lands Cleanup Day | First Saturday after Labor Day | September 11 |
| National Grandparents Day | First Sunday in September after Labor Day | September 12 |
| National Pet Memorial Day, National Hug Your Hound Day | Second Sunday | September 12 |
| Day of the Programmer | 256th day of the year | September 13 |
| National Boss/Employee Exchange Day | Monday after Labor Day | September 13 |
| National Ants on a Log Day | Second Tuesday | September 14 |
| National Pawpaw Day | Third Thursday | September 16 |
| National POW/MIA Recognition Day, National Tradesmen Day | Third Friday | September 17 |
| National Dance Day, National Cleanup Day, National Gymnastics Day, Responsible Dog Ownership Day | Third Saturday | September 18 |
| Wife Appreciation Day | Third Sunday | September 19 |
| National Voter Registration Day, National IT Professionals Day | Third Tuesday | September 21 |
| Innergize Day | Day after the autumnal equinox | September 24 |
| National Brave Day | Fourth Friday | September 24 |
| National Public Lands Day, National Hunting and Fishing Day, National Seat Check Saturday | Fourth Saturday | September 25 |
| National Ghost Hunting Day, Save Your Photos Day, National Family Health and Fitness Day USA | Last Saturday | September 25 |
| International Daughters Day | Fourth Sunday | September 26 |
| Gold Star Mother’s Day | Last Sunday | September 26 |
| National Family Day | Fourth Monday | September 27 |
| National Women’s Health and Fitness Day, World Dense Breast Day | Last Wednesday | September 29 |
| World Maritime Day | Last Thursday | September 30 |
Frequently asked questions
Is there a federal holiday in September 2027?
Yes. Labor Day, the first Monday in September, falls on September 6, 2027 and is the month’s only federal holiday. Federal offices, banks, post offices and most schools close. Patriot Day, Constitution Day and Gold Star Mother’s Day are all federally designated observances but none is a holiday and none closes anything.
Which September observance do most lists get wrong?
Carl Garner Federal Lands Cleanup Day, a statutory observance under 36 U.S.C. § 104, is missing from nearly every published September list despite falling on September 11 in 2027. Two other common errors: National Gay Men’s HIV/AIDS Awareness Day is a fixed September 27 date according to the CDC, HIV.gov and the NIH, but is frequently listed on the last Friday of the month, and National Brave Day is defined as the fourth Friday yet often published a day late.
When does fall begin in 2027?
The autumnal equinox occurs on Thursday, September 23, 2027 at 06:01 UTC, which is 2:01 a.m. EDT and 1:01 a.m. CDT. For the Pacific time zone, Alaska and Hawaii the moment falls on the evening of September 22, so West Coast calendars may show the earlier date. Both are correct for their own time zones.
Is Rosh Hashanah in September 2027?
No. Rosh Hashanah 5788 begins at sundown on Friday, October 1, 2027, with the first day on Saturday, October 2. Hebrew year 5787 is a leap year carrying an intercalary month of Adar I, which pushes the High Holidays to the latest end of their range and leaves September 2027 without them. Yom Kippur follows on October 11.
Is Patriot Day a day off work?
No. 36 U.S.C. § 144 designates September 11 as Patriot Day and requests flags at half-staff and a nationwide moment of silence, but it creates no holiday. In 2027 it falls on a Saturday.
