Editing September (section)

== Observances ==

''This list does not necessarily imply either official status or general observance.''

[[File:Logansapphire.jpg|thumb|right|[[Sapphire]], September [[birthstone]]]]
=== Non-Gregorian ===
* [[List of observances set by the Bahá'í calendar]]
* [[List of observances set by the Chinese calendar]]
* [[List of observances set by the Hebrew calendar]]
* [[List of observances set by the Islamic calendar]]
* [[List of observances set by the Solar Hijri calendar]]

=== Month-long ===
* [[Amerindian Heritage Month (Guyana)]]
* [[Childhood Cancer Awareness Month]] (United Kingdom)
* Gynecologic Cancer Awareness Month<ref name="sgno.org">{{cite web|url=https://www.sgno.org/outreach/cancer-awareness-month/|title=Cancer Awareness Month :: Society of Gynecologic Nurse Oncologists|website=www.sgno.org}}</ref>
* Leukemia and Lymphoma Awareness Month<ref>{{Cite web |url=http://www.cinj.org/sites/cinj/files/documents/Sept15LeukemiaLymphoma.pdf |title=September Is Leukemia and Lymphoma Awareness Month |access-date=2016-08-19 |archive-date=2015-09-05 |archive-url=https://web.archive.org/web/20150905200718/http://www.cinj.org/sites/cinj/files/documents/Sept15LeukemiaLymphoma.pdf |url-status=dead }}</ref>
* Ovarian Cancer Awareness Month<ref name="sgno.org"/>
* Thyroid Cancer Awareness Month<ref>{{cite web|url=http://www.thyca.org/how-to-help/awareness/september/|title=September Is Thyroid Cancer Awareness Month – ThyCa: Thyroid Cancer Survivors' Association, Inc.|first=Spark CMS by|last=Baunfire.com|website=www.thyca.org}}</ref>
* National Suicide Prevention Month<ref>{{Cite web|url=https://suicidepreventionlifeline.org/promote-national-suicide-prevention-month/|title=Promote National Suicide Prevention Month|website=suicidepreventionlifeline.org|language=en-US|access-date=2019-11-25}}</ref>
* Vegetable Month<ref>{{cite web | url=https://healthy-kids.com.au/teachers/fruit-veg-month/ | title=Fruit & Veg Month – Healthy Kids | date=8 October 2013 }}</ref>

==== United States ====
* Better Breakfast Month<ref name="unl-sep" />
* Food Safety Education Month<ref name="unl-sep" />
* National [[Childhood obesity|Childhood Obesity]] Awareness Month<ref name="unl-sep">{{cite web | url = http://food.unl.edu/web/fnh/september | title = Food Days, Weeks, Months – September | publisher = [[University of Nebraska–Lincoln]] | work = UNL Food }}</ref><ref name="gastronomica-11-4">{{cite journal |url = http://www.gastronomica.org/national-turkey-day/ |title = National Turkey Day |journal = [[Gastronomica]] |year = 2011 |volume = 11 |number = 4 |first = Darra |last = Goldstein|pages = iii–iv |doi = 10.1525/gfc.2012.11.4.iii |url-access = subscription }}</ref>
* Hydrocephalus Awareness Month<ref>{{cite web|title=September is Hydrocephalus Awareness Month! Here's What You Can Do...|url=http://www.hydroassoc.org/september-is-hydrocephalus-awareness-month-heres-what-you-can-do/|website=Hydrocephalus Association|access-date=29 July 2016}}</ref>
* [[Pain Awareness Month]]
* [[National Preparedness Month]]
* [[National Prostate Health Month]]
* National [[Sickle-cell disease|Sickle Cell]] Awareness Month<ref name="unl-sep" />
* [[National Yoga Month]]

===== Food months =====
* [[National Bourbon Heritage Month]]
* California Wine Month<ref>{{cite web|url=http://www.discovercaliforniawines.com/californiawinemonth/|title=California Wine Month – California Wines|website=www.discovercaliforniawines.com|access-date=2016-08-20|archive-date=2018-11-27|archive-url=https://web.archive.org/web/20181127034015/http://www.discovercaliforniawines.com/californiawinemonth/|url-status=dead}}</ref>
* National Chicken Month<ref name="unl-sep" />
* [[National Honey Month]]
* [[Mushroom Council#National Mushroom Month|National Mushroom Month]]
* National Italian Cheese Month <ref>{{cite web|url=https://nationaldaycalendar.com/september-holidays/|title=September Monthly Observations|date=4 January 2016}}</ref>
* National Papaya Month<ref name="unl-sep" />
* National Potato Month<ref name="unl-sep" />
* National Rice Month<ref name="unl-sep" />
* National Whole Grains Month<ref name="unl-sep" />
* National Wild Rice Month<ref name="unl-sep" />

=== Movable Gregorian ===
[[File:2008-05-04 at 18-26-44-Forgetmenot-Flower.jpg|thumb|right|[[Forget-me-not]], September birth flower]]
* [[Engineer's Day|Engineering Day (Egypt)]]
* [[White Balloon Day]]
* [[Day of the Programmer]]
* [[Te Wiki o te Reo Māori]] (Māori Language Week) ([[New Zealand]])<ref>{{Cite web |url=https://www.tewikiotereomaori.co.nz/ |title=Home » te Wiki o te Reo Māori |access-date=2020-02-05 |archive-date=2020-02-06 |archive-url=https://web.archive.org/web/20200206075938/https://www.tewikiotereomaori.co.nz/ |url-status=dead }}</ref>
* See also [[Movable Western Christian observances]]
* See also [[Movable Eastern Christian observances]]

==== First Wednesday ====
* [[Administrative Professionals' Day]] ([[South Africa]])

==== First Thursday ====
* [[Engineer's Day]]s ([[Tanzania]])

==== First Friday ====
* [[Engineer's Day]]s ([[Tanzania]])
* [[Public holidays in the Marshall Islands|Labor Day]] ([[Marshall Islands]])
* [[Teachers' Day]] ([[Singapore]])

==== First Sunday ====
* [[Brazilian Day]] ([[International observance]])
* [[Father's Day]] ([[Australia]], [[Fiji]], [[New Zealand]], [[Papua New Guinea]])
* [[Memorial of the Holy Guardian Angels]] ([[Roman Catholic Church]], October 2 in most locations, first Sunday in September by special dispensation)

==== First Sunday after September 4 ====
* [[Wakes Week]] (Parts of [[England]] and [[Scotland]])
** [[Abbots Bromley Horn Dance]] ([[Abbots Bromley]], [[Staffordshire]], [[England]])

==== Week of the first Monday ====
* [[National Payroll Week]] ([[United States]], [[Canada]], [[United Kingdom]])

==== Week of September 10 ====
* [[National Suicide Prevention Week]] ([[United States]])

==== First Monday ====
* [[Labour Day]] ([[Canada]], [[Palau]], [[United States]])

==== Nearest weekday to September 12 ====
* [[Battle of Saragarhi#Saragarhi Day|Saragarhi Day]] ([[Sikhism]])

==== Second Saturday ====
* [[Public holidays in Turkmenistan|Day of the Workers in the Oil, Gas, Power, and Geological Industry]] ([[Turkmenistan]])

==== Saturday after first Monday ====
* [[Carl Garner Federal Lands Cleanup Day]] ([[United States]])

==== Second Sunday ====
* [[Scientology holidays|Auditor's Day]] ([[Church of Scientology]])
* [[Father's Day]] ([[Latvia]])
* [[National Grandparents' Day]] ([[Canada]], [[Estonia]])
* [[Public holidays in Russia#Popular holidays which are not public holidays|Tanker's Day]] ([[Russia]])
* [[Public holidays in Turkmenistan|Turkmen Bakhshi Day]] ([[Turkmenistan]])

==== First Sunday after first Monday ====
* [[National Grandparents' Day]] ([[United States]])

==== Week of September 17 ====
* [[Celebrate Freedom Week]] ([[Kansas]] and [[Texas]], [[United States]])

==== Third Tuesday ====
* [[Prinsjesdag]] ([[Netherlands]])

==== September 17 but observed on previous Friday if it falls on a Saturday or following Monday if on a Sunday ====
* [[Constitution Day and Citizenship Day]]

==== Third Friday ====
* [[National POW/MIA Recognition Day]] ([[United States]])
[[File:United States POW-MIA flag.svg|thumb|POW☆MIA Flag.]]
==== Third Saturday ====
* [[National Cleanup Day]] (United States)
* [[Oktoberfest celebrations]] begin ([[German diaspora]], local dates may vary)
* [[Software Freedom Day]] ([[International observance]])

==== Weekend of the week of September 17 ====
* [[Von Steuben Day]] ([[United States]])

==== Third Sunday ====
* [[Day of the Walloon Region]] ([[Wallonia]], [[Belgium]])
* [[Father's Day]] ([[Ukraine]])
* [[Federal Day of Thanksgiving, Repentance and Prayer]] ([[Switzerland]])
* [[Warachikuy]] ([[Cusco]], [[Peru]])

==== Week of Sunday before September 23 ====
* [[List of LGBT holidays|Bisexual Awareness Week]]

==== Week of September 22 ====
* [[Hobbit Day|Tolkien Week]]

==== Last week ====
* [[Banned Books Week]] ([[International observance]]):

==== Last full week ====
* [[National forest week|National Forest Week]] ([[Canada]])
** [[Arbor Day#Canada|National Tree Day]] (Wednesday of last full week):
* [[Celebrate Freedom Week]] ([[Arkansas]] and [[Florida]], [[United States]])

==== Third Monday ====
* [[Respect for the Aged Day]] ([[Japan]])

==== Pertaining to the [[September Equinox]] ====
* [[Autumnal Equinox Day]] ([[Japan]])
** [[French Republican Calendar|French Republican]] New Year. (defunct)
* [[Guldize]] ([[Cornish people]])
* [[Higan]] ([[Japan]])
* [[Wheel of the Year#Autumn Equinox (Mabon)|Mabon]] ([[Neopaganism]], [[Northern Hemisphere]])
* [[Miķeļi]] ([[Latvia]])
* [[Wheel of the Year#Spring Equinox (Ostara)|Ostara]]  ([[Neopaganism]], [[Southern Hemisphere]])

==== Fourth Friday ====
* [[Native American Day]] ([[California]], [[United States]])

==== Last Friday ====
* [[Public holidays in the Marshall Islands|Manit Day]] ([[Marshall Islands]])

==== Last Saturday ====
* [[Women in Aviation, International#Girls in Aviation Day|Girls in Aviation Day]] ([[International observance]])
* [[National Public Lands Day]] ([[United States]])

==== Last Sunday ====
* [[Daylight saving time]] begins ([[New Zealand]])
* [[Gold Star Mothers Club|Gold Star Mother's Day]] ([[United States]])

==== Fourth Monday ====
* [[American Indian Day]] ([[Tennessee]], [[United States]])
* [[September Declaration]] ([[Flanders]], [[Belgium]])

==== Last Wednesday ====
* [[Arbor Day#Canada|Maple Leaf Day]] ([[Canada]])

==== Last weekday ====
* [[Ask a Stupid Question Day]] ([[India]], [[United Kingdom]], [[United States]])

=== Fixed Gregorian ===
[[File:Liège (3).JPG|right|thumb|[[School]] starts in September in many countries, such as Belgium]]
* [[September 1]]
** [[List of holidays by country#Eritrea|Anniversary of the Start of the Armed Struggle]] ([[Eritrea]])
** [[Constitution Day (Slovakia)]]
** [[1923 Great Kantō earthquake|Disaster Prevention Day]] ([[Japan]])
** [[Emma Nutt#Commemoration|Emma Nutt Day]] ([[International observance]])
** [[First day of school]] in many countries in Asia, Europe and the Americas.
** [[Flag Day]] ([[Honduras]])
** [[Independence Day (Uzbekistan)]]
** [[Journalist Day]] ([[Taiwan]])
** [[Knowledge Day]] ([[Russia]], [[Ukraine]] and [[Armenia]])
** [[List of food days#September|National Cherry Popover Day]] ([[United States]])
** [[Random Acts of Kindness Day]] ([[New Zealand]])
** Start of [[National Arbor Week]] ([[South Africa]]), September 1–7
** [[Public holidays in Poland#Holidays declared by statute|Veteran's Day]] ([[Poland]])
** [[Teachers' Day]] ([[Singapore]])
** [[Wattle Day]] ([[Australia]])
* [[September 2]]
** [[Parliament of the Central Tibetan Administration|Democracy Day]] ([[Tibet]])
** [[Independence Day]] (Transnistria, unrecognized)
** [[Independence Day]] ([[Nagorno-Karabakh Republic]], unrecognized)
** [[List of food days#September|National Blueberry Popsicle Day]] ([[United States]])
** [[National Day (Vietnam)]]
** [[Sedantag]] ([[German Empire]], defunct)
** [[Victory over Japan Day]] ([[United States]])
* [[September 3]]
** China's [[Victory over Japan Day|victory over Japan]] commemoration related observances:
*** [[Armed Forces Day#Republic of China|Armed Forces Day]] ([[Republic of China]])
*** [[Victory over Japan Day#China|V-J Day]] ([[People's Republic of China]])
** [[Feast of San Marino and the Republic]] ([[Republic of San Marino]])
** [[Flag Day (Australia)]]
** [[Independence Day]] ([[Qatar]])
** [[Levy Mwanawasa Day]] ([[Zambia]])
** [[Memorial Day]] ([[Tunisia]])
** [[Canadian Merchant Navy|Merchant Navy Remembrance Day]] ([[Canada]])
** [[Merchant Navy (United Kingdom)]]
** [[List of food days#September|National Welsh Rarebit Day]] ([[United States]])
** [[Public holidays in Tokelau|Tokehega Day]] ([[Tokelau]], [[New Zealand]])
* [[September 4]]
** [[Immigration to Argentina|Immigrant's Day]] ([[Argentina]])
** [[List of food days#September|National Macadamia Nut Day]] ([[United States]])
** [[Newspaper Carrier Day]] ([[United States]])
* [[September 5]]
** [[International Day of Charity]]
** [[List of food days#September|National Cheese Pizza Day]] ([[United States]])
** [[Teachers' Day]] ([[India]])
* [[September 6]]
** [[Public holidays in São Tomé and Príncipe|Armed Forces Day]] (São Tomé and Príncipe)
** [[Public holidays in Pakistan|Defence Day]] or [[Armed Forces Day#Pakistan|Army Day]] (Pakistan)
** [[Flag Day]] ([[Bonaire]])
** [[Independence Day]] (Eswatini)
** [[List of food days#September|National Coffee Ice Cream Day]] ([[United States]])
** [[Unification Day (Bulgaria)]]
* [[September 7]]
** [[Air Force Day (Pakistan)]]
** [[Independence Day (Brazil)]]
** [[Armed Forces of Ukraine#Military holidays|Military Intelligence Day]] (Ukraine)
** [[List of food days#September|National Acorn Squash Day]] ([[United States]])
** [[List of food days#September|National Beer Lover's Day]] ([[United States]])
** [[List of food days#September|National Salami Day]] ([[United States]])
** [[Benjamin the thylacine|National Threatened Species Day]] ([[Australia]])
** [[Public holidays in Mozambique|Victory Day]] ([[Mozambique]])
* [[September 8]]
** [[Days of Military Honour|Day of the Battle of Borodino]] (Russia)
** [[Our Lady of Meritxell|Feast Day of Our Lady of Meritxell]] (Andorra)
** [[Independence Day (North Macedonia)]]
** [[International Literacy Day]]
** [[Martyrs' Day (Afghanistan)]] (date may fall on September 9, follows a non-Gregorian calendar)
** [[National day]] (Andorra)
** [[Nativity of Mary]] ([[Roman Catholic Church]]), ([[Anglo-Catholicism]])
*** [[Monti Fest]] ([[Mangalorean Catholic]])
** [[Victory Day#September 8 in Pakistan|Victory Day]] (Pakistan)
** [[Victory Day (Malta)]]
** [[World Physical Therapy Day]]
* [[September 9]]
[[File:Morning glory.jpg|alt=Morning glories|thumb|[[Morning glory|Morning glories]], one of the birth flowers of September.]]
** [[Armed Forces of Ukraine#Military holidays|Armored Forces Day]] (Ukraine)
** [[California Admission Day]] ([[California]], United States)
** [[Children's Day]] (Costa Rica)
** [[Chrysanthemum Day]] ([[Japanese calendar#National Holidays|Japan]])
** [[Remembrance days in Slovakia|Day of the Victims of Holocaust and of Racial Violence]] (Slovakia)
** [[Emergency Services Day (United Kingdom)|Emergency Services Day]] (United Kingdom)
** [[Public holidays in North Korea|Independence Day or Republic Day]] (North Korea)
** [[Independence Day]] (Tajikistan) from [[USSR]] in 1991.
** [[Martyrs' Day (Afghanistan)]] (date may fall on September 8, follows a non-Gregorian calendar)
** [[List of food days#September|National Steak Au Poivre Day]] (United States)
** [[Ásatrú holidays#The Troth|Remembrance for Herman the Cheruscan]] ([[The Troth]])
** [[List of food days#September|Wienerschnitzel Day]] (United States)
* [[September 10]]
** [[Amerindian Heritage Month (Guyana)|Amerindian Heritage Day]] (Guyana)
** [[Children's Day]] (Honduras)
** [[Gibraltar National Day|National Day]] ([[Gibraltar]])
** [[List of food days#September|National TV Dinner Day]] ([[United States]])
** [[Saint George's Caye Day]] (Belize)
** [[Teachers' Day]] (China)
** [[World Suicide Prevention Day]]
* [[September 11]]
** [[Days of Military Honour|Battle of Tendra Day]] (Russia)
** [[Muhammad Ali Jinnah|Death Anniversary of Quaid-e-Azam Muhammad Ali Jinnah]], a former holiday. (Pakistan)
** [[List of observances in the United States by presidential proclamation#Annual special days recognized by presidential proclamation|Emergency Number Day]] (United States)
** [[Enkutatash]] falls on this day if it is not a leap year.(Ethiopia, [[Rastafari]])
** [[National Day of Catalonia]] ([[Catalonia]])
** [[List of food days#September|National Hot Cross Bun Day]] (United States)
** [[Nayrouz]] ([[Coptic Orthodox Church]])
** [[Patriot Day]] (United States)
** [[Teachers' Day]] (Argentina)
* [[September 12]]
** [[Most Holy Name of the Blessed Virgin Mary]]
** [[Day of Conception]] (Russia)
** [[Day of the Programmer]], during a [[leap year]]. (International)
** [[Defenders Day (Maryland)|Defenders Day]] ([[Maryland]]. (United States)
** [[Enkutatash]] falls on this day if it is a leap year. (Ethiopia, [[Rastafari]])
** [[Mindfulness Day]]
** [[List of food days#September|National Chocolate Milkshake Day]] (United States)
** [[Public holidays in Cape Verde|National Day]] (Cape Verde)
** [[National Day of Encouragement]] (United States)
* [[September 13]]
** [[Day of the Programmer]], during a non-[[leap year]]. (International)
** [[Feast of the Cross#September 13|Feast of the Cross]] ([[Assyrian Church of the East]])
** ''[[Niños Héroes|Día de los Niños Héroes]]'' (Mexico)
** [[Engineer's Day]] (Mauritius)
** [[International Chocolate Day]]
** [[List of food days#September|National Peanut Day]] ([[United States]])
* [[September 14]]
** [[Children's Day#Nepal|Children's Day]] (Nepal) (celebrated on the 15th on leap years)
** [[Engineer's Day]] (Romania)
** [[Feast of the Cross]] (Christianity)
*** [[Elevation of the Holy Cross]] ([[Eastern Orthodox]])
** [[Hindi Diwas]] ([[Hindi Belt|Hindi-speaking regions]])
** [[Armed Forces of Ukraine#Military holidays|Mobilized Servicemen Day]] (Ukraine)
** [[List of food days#September|National Cream Filled Donut Day]] ([[United States]])
** [[List of food days#September|National Eat a Hoagie Day]] (United States)
** [[Battle of San Jacinto (1856)|San Jacinto Day]] (Nicaragua)
* [[September 15]]
[[File:Aster amellus - blooms (aka).jpg|alt=Asters|thumb|[[Aster (genus)|Asters]], a September birth flower.]]
** [[Battle of Britain#Battle of Britain Day|Battle of Britain Day]]{{Broken anchor|date=2025-05-19|bot=User:Cewbot/log/20201008/configuration|target_link=Battle of Britain#Battle of Britain Day|reason=Anchor "Battle of Britain#Battle of Britain Day" links to a specific web page: "Battle of Britain Day". The anchor (Battle of Britain Day) [[Special:Diff/1291178077|has been deleted]].|diff_id=1291178077}} (United Kingdom)
** [[Children's Day#Nepal|Children's Day]] (Nepal) (leap years only)
** [[Engineer's Day]] (India)
** [[Free Money Day]] (International)
** [[Independence Day]] (Guatemala, El Salvador, Honduras, Nicaragua, and Costa Rica)
** [[International Day of Democracy]] ([[International observance|International]])
** [[Public holidays in Azerbaijan#Other observances|Knowledge Day]] (Azerbaijan)
** [[List of food days#September|National Crème de Menthe Day]] ([[United States]])
** [[List of food days#September|National Double Cheeseburger Day]] ([[United States]])
** [[List of food days#September|National Linguine Day]] ([[United States]])
** [[List of food days#September|National Cheese Toast Day]] ([[United States]])
** [[Días Patrios (Guatemala)|Patriotic Day]] (Guatemala)
** [[Public holidays in Slovenia|Restoration of Primorska to the Motherland Day]] (Slovenia)
** [[Silpa Bhirasri|Silpa Bhirasri Day]] (Thailand).
** [[World Lymphoma Awareness Day]]
** The beginning of [[National Hispanic Heritage Month]], celebrated until October 15 (United States)
* [[September 16]]
** [[Grito de Dolores]] (Mexico)
** [[Independence Day (Papua New Guinea)]], celebrates the independence of Papua New Guinea from Australia in 1975.
** [[International Day for the Preservation of the Ozone Layer]]
** [[Armed Forces Day#Malaysia|Malaysian Armed Forces Day]] (Malaysia)
** [[Malaysia Day]] (Malaysia, Singapore)
** [[Martyrs' Day#Libya|Martyrs' Day]] (Libya)
** [[National Heroes Day (Saint Kitts and Nevis)|Heroes' Day]] (Saint Kitts and Nevis)
** [[List of food days#September|National Cinnamon Raisin Toast Day]] ([[United States]])
** [[List of food days#September|National Guacamole Day]] ([[United States]])
* [[September 17]]
** [[Australian Citizenship Day]]
** [[Constitution Day and Citizenship Day]] (observed on the previous Friday if it falls on a Saturday, the following Monday if on a Sunday)
** Start of [[Constitution Week]], runs from September 17–23
** [[Heroes' Day (Angola)]]
** [[Marathwada Liberation Day]] (India)
** [[List of food days#September|National Apple Dumpling Day]] ([[United States]])
** [[List of food days#September|National Monte Cristo Sandwich Day]] ([[United States]])
** [[Operation Market Garden|Operation Market Garden Anniversary]] is still remembered with parachuting and dedications on this day. (Netherlands)
** [[Teachers' Day]] (Honduras)
** [[Von Steuben Day]]. (United States), weekend of the week of September 17.
* [[September 18]]
** [[Day of National Music]] (Azerbaijan)
** First day of [[Fiestas Patrias (Chile)]] or ''Dieciocho'' (Chile)
** [[Ryukyuan languages#Status|Island Language Day]] ([[Okinawa Prefecture]], Japan)
** [[List of food days#September|National Cheeseburger Day]] ([[United States]])
** [[Navy Day]] (Croatia)
** [[World Water Monitoring Day]] ([[International observance|International]])
* [[September 19]]
** [[Armed Forces Day (Chile)]]
** [[Day of the First Public Appearance of the Slovak National Council]]
** [[Feast of San Gennaro]]
** Second day of [[Fiestas Patrias (Chile)]]
** [[Independence Day]] ([[Saint Kitts and Nevis]])
** [[International Talk Like a Pirate Day]]
** [[List of food days#September|National Butterscotch Pudding Day]] ([[United States]])
* [[September 20]]
** [[Independence Day]] of South Ossetia (not fully recognized)
** [[List of food days#September|National Pepperoni Pizza Day]] ([[United States]])
** [[List of food days#September|National Punch Day]] ([[United States]])
** [[List of food days#September|National Rum Punch Day]] ([[United States]])
** [[National Youth Day (Thailand)]]
** [[Oil Workers' Day]] (Azerbaijan)
** [[Universal Children's Day (Germany)]]
* [[September 21]]
** [[Arbor Day (Brazil)]]
** [[Proclamation No. 1081|Commemoration of the Declaration of Martial Law]] ([[Philippines]])
** [[Customs Service Day]] ([[Poland]])
** [[Founder's Day (Ghana)|Founder's Day]] and [[National Volunteer Day]] ([[Ghana]])
** [[Independence Day (Armenia)|Independence Day]], celebrates the independence of [[Armenia]] from the [[Soviet Union]] in 1991.
** [[Independence Day (Belize)|Independence Day]], celebrates the independence of [[Belize]] from the United Kingdom in 1981.
** [[Independence Day (Malta)|Independence Day]], celebrates the independence of [[Malta]] from the United Kingdom in 1964.
** [[International Day of Peace]] ([[International observance|International]])
** [[List of food days#September|National Pecan Cookie Day]] ([[United States]])
** [[September (Earth, Wind & Fire song)|Acknowledgement of Earth, Wind, & Fire's "September"]]
** [[Student's Day (Bolivia)]]
** [[Victory over the Golden Horde in the Battle of Kulikovo]] (Russia)
* [[September 22]]
** [[American Business Women's Day]] ([[United States]])
** [[Hobbit Day]], the containing week is celebrated as Tolkien Week. ([[Tolkien fandom|American Tolkien Society]])
** [[Independence Day (Bulgaria)|Independence Day]], celebrates the independence of [[Bulgaria]] from the [[Ottoman Empire]] in 1908.
** [[Independence Day (Mali)|Independence Day]], celebrates the independence of [[Mali]] from France in 1960.
** [[OneWebDay]], an annual day of Internet celebration and awareness, started in 2006.
** [[Resistance Fighting Day]] ([[Estonia]])
** [[World Car-Free Day]]
* [[September 23]]
** [[Celebrate Bisexuality Day]]
** [[Grito de Lares]] ([[Puerto Rico]])
** [[Holocaust Memorial Day (Lithuania)]]
** [[Public holidays in Kyrgyzstan|Kyrgyz Language Day]] ([[Kyrgyzstan]])
** [[Saudi National Day|National Day]] ([[Saudi Arabia]])
** [[Teachers' Day (Brunei)]]
* [[September 24]]
** [[Armed Forces Day (Peru)]]
** [[Constitution Day (Cambodia)]]
** [[La Mercè]] ([[Barcelona]])
** [[Heritage Day (South Africa)]]
** [[Independence Day (Guinea-Bissau)]]
** [[Mahidol Day]] ([[Thailand]])
** [[National Punctuation Day]] ([[United States]])
** [[New Caledonia Day]] ([[New Caledonia]])
** [[Republic Day (Trinidad and Tobago)]]
* [[September 25]]
[[Image:September WPA poster.jpg|thumb|right|[[Works Progress Administration|WPA]] poster, [[1940]]]]
** [[Harki|Day of National Recognition for the Harkis]] ([[France]])
** [[List of food days#Germany|German Butterbrot Day]] ([[Germany]])
** [[List of food days#September|National Lobster Day]] ([[United States]])
** [[Public holidays in Nauru|National Youth Day]] ([[Nauru]])
** [[Public holidays in Mozambique|Revolution Day]] ([[Mozambique]])
* [[September 26]]
** [[Flag Day|Day of the National Flag]] ([[Ecuador]])
** [[Dominion Day]] ([[New Zealand]])
** [[European Day of Languages]] ([[European Union]])
** [[List of food days#September|Johnny Appleseed Day]] ([[United States]])
** [[List of food days#September|National Better Breakfast Day]] ([[United States]])
** [[List of food days#September|National Dumpling Day]] ([[United States]])
** [[National Good Neighbor Day]] ([[United States]])
** [[List of food days#September|National Pancake Day]] ([[United States]])
** [[Yemen Arab Republic|Revolution Day]] ([[Yemen]])
* [[September 27]]
** [[Consumación de la Independencia]] ([[Mexico]])
** [[French Community Holiday]] (French community of Belgium)
** [[Meskel]] ([[Ethiopian Orthodox Church|Ethiopian]] and [[Eritrean Orthodox Church]], following [[Julian calendar]], September 28 on leap years)
** [[List of food days#September|National Chocolate Milk Day]] ([[United States]])
** [[List of food days#September|National Corned Beef Hash Day]] ([[United States]])
** [[AIDS.gov#External links|National Gay Men's HIV/AIDS Awareness Day]] ([[United States]])
** [[Polish Underground State's Day]] ([[Poland]])
** [[World Tourism Day]]
* [[September 28]]
** [[Ask a Stupid Question Day]] ([[United States]])
** [[Czech Statehood Day]] ([[Czech Republic]])
** [[List of food days#September|Family Day – A Day to Eat Dinner with Your Children]] ([[United States]])
** [[Freedom from Hunger Day]]
** [[International Right to Know Day]]
** [[Meskel]] ([[Ethiopian Orthodox Church|Ethiopian]] and [[Eritrean Orthodox Church]], September 28 on leap years only, all other years is September 27)
** [[National Day of Awareness and Unity against Child Pornography]] ([[Philippines]])
** [[Teachers' Day]] ([[Taiwan]] and Chinese-Filipino schools in the [[Philippines]])
** [[World Rabies Day]]
* [[September 29]]
** Feast of the [[Archangel]]s [[Michael (archangel)|Michael]], [[Gabriel]], and [[Raphael (archangel)|Raphael]].
** [[List of food days#September|National Biscotti Day]] ([[United States]])
** [[International Coffee Day|National Coffee Day]] (multiple countries, see article)
** [[Inventors' Day]] ([[Argentina]])
** [[Michaelmas]] One of the four [[quarter days]] in the [[Irish calendar]]. (England and Ireland)
** [[Victory of Boquerón Day]] (Paraguay)
** [[World Heart Federation|World Heart Day]]
* [[September 30]]
** [[Agricultural Reform (Nationalization) Day]] ([[São Tomé and Príncipe]])
** [[Birth of Morelos]] ([[Mexico]])
** [[Blasphemy Day]] ([[United States]], [[Canada]], other countries)
** [[Public holidays in Poland#Holidays declared by statute|Boy's Day]] ([[Poland]])
** [[Independence Day (Botswana)]]
** [[International Translation Day]] ([[International Federation of Translators]])
** [[List of food days#September|National Hot Mulled Cider Day]] ([[United States]])
** [[Recovery Day]] ([[Canada]])
** [[Orange Shirt Day]] ([[Canada]])