September is the ninth month of the year in the Julian and

Gregorian calendar The Gregorian calendar is the calendar used in most parts of the world. It went into effect in October 1582 following the papal bull issued by Pope Gregory XIII, which introduced it as a modification of, and replacement for, the Julian cale ...

s. Its length is 30 days. September in the

Northern Hemisphere The Northern Hemisphere is the half of Earth that is north of the equator. For other planets in the Solar System, north is defined by humans as being in the same celestial sphere, celestial hemisphere relative to the invariable plane of the Solar ...

and

March March is the third month of the year in both the Julian and Gregorian calendars. Its length is 31 days. In the Northern Hemisphere, the meteorological beginning of spring occurs on the first day of March. The March equinox on the 20 or 2 ...

in the Southern Hemisphere are seasonally equivalent. In the Northern hemisphere, the beginning of the meteorological autumn is on 1 September. In the Southern hemisphere, the beginning of the meteorological spring is on 1 September. September marks the beginning of the ecclesiastical year in the

Eastern Orthodox Church The Eastern Orthodox Church, officially the Orthodox Catholic Church, and also called the Greek Orthodox Church or simply the Orthodox Church, is List of Christian denominations by number of members, one of the three major doctrinal and ...

. It is the start of the academic year in many countries of the northern hemisphere, in which children go back to school after the summer break, sometimes on the first day of the month. Some Libras and Virgos are born in September, with Virgos being born on September 1st through September 22nd and Libras

September 23rd Events Pre-1600 * 38 – Drusilla, Caligula's sister who died in June, with whom the emperor is said to have an incestuous relationship, is deified. * 1122 – Pope Callixtus II and Holy Roman Emperor Henry V agree to the Concord ...

through September 30.

September September is the ninth month of the year in the Julian and Gregorian calendars. Its length is 30 days. September in the Northern Hemisphere and March in the Southern Hemisphere are seasonally equivalent. In the Northern hemisphere, the b ...

(from Latin ''septem'', "seven") was originally the seventh month in the oldest known

Roman calendar The Roman calendar was the calendar used by the Roman Kingdom and Roman Republic. Although the term is primarily used for Rome's pre-Julian calendars, it is often used inclusively of the Julian calendar established by Julius Caesar in 46&nbs ...

, the calendar of Romulus , with March being (Latin '' Martius'') the first month of the year until perhaps as late as 451 BC. After the calendar reform that added

January January is the first month of the year in the Julian calendar, Julian and Gregorian calendars. Its length is 31 days. The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the No ...

and

February February is the second month of the year in the Julian calendar, Julian and Gregorian calendars. The month has 28 days in common years and 29 in leap years, with the February 29, 29th day being called the ''leap day''. February is the third a ...

to the beginning of the year, September became the ninth month but retained its name. It had 29 days until the Julian reform, which added a day.

Events

Ancient Roman In modern historiography, ancient Rome is the Roman people, Roman civilisation from the founding of Rome, founding of the Italian city of Rome in the 8th century BC to the Fall of the Western Roman Empire, collapse of the Western Roman Em ...

observances for September include

Ludi Romani The ''Ludi Romani'' ("Roman Games"; see '' ludi'') was a religious festival in ancient Rome held annually, starting in 366 BC, from September 12 to September 14. In the 1st century BC, an extra day was added in honor of the deified Julius Caesa ...

, originally celebrated from September 12 to September 14, later extended to September 5 to September 19. In the 1st century BC, an extra day was added in honor of the deified Julius Caesar on 4 September.

Epulum Jovis In ancient Roman religion, the Epulum Jovis (also Epulum Iovis) was a sumptuous ritual feast offered to Jove on the Ides of September (September 13) and a smaller feast on the Ides of November (November 13). It was celebrated during the '' Ludi ...

was held on September 13.

Ludi Triumphales In the Roman Empire of the 4th century, the ''Ludi Triumphales'' ("Triumphal Games") were games ''(ludi)'' held annually September (Roman month)#Dates, September 18–22 to commemorate the victory of Constantine I, Constantine over Licinius at Batt ...

was held from September 18–22. The

Septimontium The Septimontium was a proto-Urban area, urban Roman festival, festival celebrated in ancient Rome by ''montani'', residents of the seven ''(sept-)'' communities associated with the hills or peaks of Rome ''(montes)'': Oppius, Palatine Hill, Palati ...

was celebrated in September, and on December 11 on later calendars. These dates do not correspond to the modern Gregorian calendar. September was called the "harvest month" in

Charlemagne Charlemagne ( ; 2 April 748 – 28 January 814) was List of Frankish kings, King of the Franks from 768, List of kings of the Lombards, King of the Lombards from 774, and Holy Roman Emperor, Emperor of what is now known as the Carolingian ...

's calendar. September corresponds partly to the

Fructidor Fructidor () is the twelfth month in the French Republican Calendar. The month was named after the Latin word ''fructus'' 'fruit'. Fructidor is the third month of the summer quarter (''mois d'été''). By the Gregorian calendar, Fructidor starts ...

and partly to the Vendémiaire of the first French republic. September is called ''Herbstmonat'', harvest month, in Switzerland. The

Anglo-Saxon The Anglo-Saxons, in some contexts simply called Saxons or the English, were a Cultural identity, cultural group who spoke Old English and inhabited much of what is now England and south-eastern Scotland in the Early Middle Ages. They traced t ...

s called the month ''Gerstmonath'', barley month, that crop being then usually harvested. In 1752, the

British Empire The British Empire comprised the dominions, Crown colony, colonies, protectorates, League of Nations mandate, mandates, and other Dependent territory, territories ruled or administered by the United Kingdom and its predecessor states. It bega ...

adopted the

. In the British Empire that year, September 2 was immediately followed by September 14. On

Usenet Usenet (), a portmanteau of User's Network, is a worldwide distributed discussion system available on computers. It was developed from the general-purpose UUCP, Unix-to-Unix Copy (UUCP) dial-up network architecture. Tom Truscott and Jim Elli ...

, it is said that September 1993 ( Eternal September) never ended. In the United States, September is one of the most common birth months (third most popular after August and July, which both have 31 days), as all but one Top 10 most common birthdays are in September, based on the National Center for Health Statistics statistics on births between 1994 and 2014. The most common birthday is September 9 (#1), least common is September 1 (#250).

Astronomy and astrology

The September equinox takes place in this month, and certain observances are organized around it. It is the Autumn equinox in the Northern Hemisphere, and the Vernal equinox in the Southern Hemisphere. The dates can vary from 21 September to 24 September (in UTC). September is mostly in the sixth month of the astrological calendar (and the first part of the seventh), which begins at the end of March/Mars/Aries.

Symbols

September's

birthstone A birthstone is a gemstone that represents a person's birth period, usually the month or zodiac sign. Birthstones are often worn as jewelry or a pendant necklace. History of birthstones Western custom The first-century historian Josephus bel ...

is the

sapphire Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide () with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon. The name ''sapphire ...

. The birth flowers are the forget-me-not,

morning glory Morning glory (also written as morning-glory) is the common name for over 1,000 species of flowering plants in the family Convolvulaceae, whose taxonomy and systematics remain in flux. These species are distributed across numerous genus, gene ...

and aster. The

zodiac The zodiac is a belt-shaped region of the sky that extends approximately 8° north and south celestial latitude of the ecliptic – the apparent path of the Sun across the celestial sphere over the course of the year. Within this zodiac ...

signs are Virgo (until September 22) and Libra (September 23 onward).. Signs in UT/GMT for 1950–2030.

Observances

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

Non-Gregorian

List of observances set by the Bahá'í calendar A list is a set of discrete items of information collected and set forth in some format for utility, entertainment, or other purposes. A list may be memorialized in any number of ways, including existing only in the mind of the list-maker, bu ...

List of observances set by the Chinese calendar The traditional Chinese holidays are an essential part of harvests or prayer offerings. The most important Chinese holiday is the Chinese New Year (Spring Festival), which is also celebrated in overseas ethnic Chinese communities (for example in ...

* 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 * Leukemia and Lymphoma Awareness Month * Ovarian Cancer Awareness Month * Thyroid Cancer Awareness Month * National Suicide Prevention Month * Vegetable Month

United States

* Better Breakfast Month * Food Safety Education Month * National Childhood Obesity Awareness Month * Hydrocephalus Awareness Month * Pain Awareness Month * National Preparedness Month * National Prostate Health Month * National Sickle Cell Awareness Month * National Yoga Month

= Food months

= * National Bourbon Heritage Month * California Wine Month * National Chicken Month * National Honey Month * National Mushroom Month * National Italian Cheese Month * National Papaya Month * National Potato Month * National Rice Month * National Whole Grains Month * National Wild Rice Month

Movable Gregorian

2008-05-04 at 18-26-44-Forgetmenot-Flower

* Engineering Day (Egypt) * White Balloon Day * Day of the Programmer * Te Wiki o te Reo Māori (Māori Language Week) (

New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...

First Wednesday

* Administrative Professionals' Day (

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

)

First Thursday

Engineer's Day Engineer's Day is observed in several countries on various dates of the year. Country-wise list See also *UNESCO World Engineering Day for Sustainable Development References External links

* *{{cite web, url=http://calendar.ut.ac.ir/, ...

s (

Tanzania Tanzania, officially the United Republic of Tanzania, is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to t ...

)

First Friday

* *{{cite web, url=http://calendar.ut.ac.ir/, ...

s (

) *

Labor Day Labor Day is a Federal holidays in the United States, federal holiday in the United States celebrated on the first Monday of September to honor and recognize the Labor history of the United States, American labor movement and the works and con ...

( Marshall Islands) * Teachers' Day (

Singapore Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...

)

First Sunday

* Brazilian Day (

International observance Lists of holidays by various categorizations. Religious holidays Abrahamic holidays (Middle Eastern) Christian holidays *Christmas (Nativity of Jesus, Nativity of Jesus Christ, the beginning of Christmastide) *Solemnity of Mary, Mother ...

) *

Father's Day Father's Day is a day set aside for honoring one's father, as well as fatherhood, paternal bonds, and the influence of fathers in society. "Father's Day" complements similar celebrations honoring family members, such as Mother's Day and, in som ...

(

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

Fiji Fiji, officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists of an archipelago of more than 330 islands—of which about ...

Papua New Guinea Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean n ...

) * Memorial of the Holy Guardian Angels (

Roman Catholic Church The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...

, October 2 in most locations, first Sunday in September by special dispensation)

First Sunday after September 4

* Wakes Week (Parts of

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

and

Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...

) ** Abbots Bromley Horn Dance ( Abbots Bromley, Staffordshire,

)

Week of the first Monday

* National Payroll Week (

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

)

Week of September 10

* National Suicide Prevention Week (

)

First Monday

Labour Day Labour Day is an annual day of celebration of the labour movement and its labor rights, achievements. It has its origins in the trade union, labour union movement, specifically the Eight-hour day movement, eight-hour day movement, which advoca ...

(

, Palau,

)

Nearest weekday to September 12

* Saragarhi Day (

Sikhism Sikhism is an Indian religion and Indian philosophy, philosophy that originated in the Punjab region of the Indian subcontinent around the end of the 15th century CE. It is one of the most recently founded major religious groups, major religio ...

)

Second Saturday

* Day of the Workers in the Oil, Gas, Power, and Geological Industry ( Turkmenistan)

Saturday after first Monday

* Carl Garner Federal Lands Cleanup Day (

)

Second Sunday

* Auditor's Day ( Church of Scientology) *

(

Latvia Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to t ...

) * National Grandparents' Day (

Estonia Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...

) * Tanker's Day (

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

) * Turkmen Bakhshi Day ( Turkmenistan)

First Sunday after first Monday

* National Grandparents' Day (

)

Week of September 17

* Celebrate Freedom Week (

Kansas Kansas ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to the west. Kansas is named a ...

and

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

)

Third Tuesday

* Prinsjesdag (

Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...

)

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 (

)

Third Saturday

* National Cleanup Day (United States) * Oktoberfest celebrations begin ( German diaspora, local dates may vary) * Software Freedom Day (

)

Weekend of the week of September 17

* Von Steuben Day (

)

Third Sunday

* Day of the Walloon Region (

Wallonia Wallonia ( ; ; or ), officially the Walloon Region ( ; ), is one of the three communities, regions and language areas of Belgium, regions of Belgium—along with Flemish Region, Flanders and Brussels. Covering the southern portion of the c ...

Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...

) *

(

Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...

) * Federal Day of Thanksgiving, Repentance and Prayer (

Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...

) * Warachikuy ( Cusco,

Peru Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pac ...

)

) ** National Tree Day (Wednesday of last full week): * Celebrate Freedom Week (

Arkansas Arkansas ( ) is a landlocked state in the West South Central region of the Southern United States. It borders Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, Texas to the southwest, and Oklahoma ...

and

Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...

)

Third Monday

* Respect for the Aged Day (

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

)

Pertaining to the September Equinox

* Autumnal Equinox Day (

) ** French Republican New Year. (defunct) * Guldize ( Cornish people) * Higan (

) * Mabon ( Neopaganism,

) * Miķeļi (

) * Ostara ( Neopaganism, Southern Hemisphere)

Fourth Friday

* Native American Day (

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

)

Last Friday

* Manit Day ( Marshall Islands)

Last Saturday

* Girls in Aviation Day (

) * National Public Lands Day (

)

Last Sunday

* Daylight saving time begins (

) * Gold Star Mother's Day (

)

Fourth Monday

* American Indian Day (

Tennessee Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t ...

) * September Declaration (

Flanders Flanders ( or ; ) is the Dutch language, Dutch-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to culture, la ...

)

Last Wednesday

* Maple Leaf Day (

)

Last weekday

* Ask a Stupid Question Day (

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

)

Fixed Gregorian

* September 1 ** Anniversary of the Start of the Armed Struggle (

Eritrea Eritrea, officially the State of Eritrea, is a country in the Horn of Africa region of East Africa, with its capital and largest city being Asmara. It is bordered by Ethiopia in the Eritrea–Ethiopia border, south, Sudan in the west, and Dj ...

) ** Constitution Day (Slovakia) ** Disaster Prevention Day (

) ** Emma Nutt Day (

) ** First day of school in many countries in Asia, Europe and the Americas. **

Flag Day A flag day is a flag-related holiday, a day designated for flying a certain flag (such as a national flag) or a day set aside to celebrate a historical event such as a nation's adoption of its flag. Flag days are usually codified in national s ...

(

Honduras Honduras, officially the Republic of Honduras, is a country in Central America. It is bordered to the west by Guatemala, to the southwest by El Salvador, to the southeast by Nicaragua, to the south by the Pacific Ocean at the Gulf of Fonseca, ...

) ** Independence Day (Uzbekistan) ** Journalist Day (

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main geography of Taiwan, island of Taiwan, also known as ''Formosa'', lies between the East China Sea, East and South China Seas in the northwestern Pacific Ocea ...

) **

Knowledge Day Knowledge Day (), often simply called 1 September, is the list of holidays, day when the Academic term, school year traditionally starts in Russia and many other former Soviet republics as well as other countries in the former Eastern Bloc (exclu ...

(

and

Armenia Armenia, officially the Republic of Armenia, is a landlocked country in the Armenian Highlands of West Asia. It is a part of the Caucasus region and is bordered by Turkey to the west, Georgia (country), Georgia to the north and Azerbaijan to ...

) ** National Cherry Popover Day (

) ** Random Acts of Kindness Day (

) ** Start of National Arbor Week (

), September 1–7 ** Veteran's Day (

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

) ** Teachers' Day (

) ** Wattle Day (

) * September 2 ** Democracy Day (

Tibet Tibet (; ''Böd''; ), or Greater Tibet, is a region in the western part of East Asia, covering much of the Tibetan Plateau and spanning about . It is the homeland of the Tibetan people. Also resident on the plateau are other ethnic groups s ...

) **

Independence Day An independence day is an annual event memorialization, commemorating the anniversary of a nation's independence or Sovereign state, statehood, usually after ceasing to be a group or part of another nation or state, or after the end of a milit ...

(Transnistria, unrecognized) **

( Nagorno-Karabakh Republic, unrecognized) ** National Blueberry Popsicle Day (

) ** National Day (Vietnam) ** Sedantag (

German Empire The German Empire (),; ; World Book, Inc. ''The World Book dictionary, Volume 1''. World Book, Inc., 2003. p. 572. States that Deutsches Reich translates as "German Realm" and was a former official name of Germany. also referred to as Imperia ...

, defunct) ** Victory over Japan Day (

) * September 3 ** China's victory over Japan commemoration related observances: *** Armed Forces Day (

Republic of China Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main geography of Taiwan, island of Taiwan, also known as ''Formosa'', lies between the East China Sea, East and South China Seas in the northwestern Pacific Ocea ...

) *** V-J Day (

People's Republic of China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

) ** Feast of San Marino and the Republic ( Republic of San Marino) ** Flag Day (Australia) **

(

Qatar Qatar, officially the State of Qatar, is a country in West Asia. It occupies the Geography of Qatar, Qatar Peninsula on the northeastern coast of the Arabian Peninsula in the Middle East; it shares Qatar–Saudi Arabia border, its sole land b ...

) ** Levy Mwanawasa Day (

Zambia Zambia, officially the Republic of Zambia, is a landlocked country at the crossroads of Central Africa, Central, Southern Africa, Southern and East Africa. It is typically referred to being in South-Central Africa or Southern Africa. It is bor ...

) ** Memorial Day (

Tunisia Tunisia, officially the Republic of Tunisia, is a country in the Maghreb region of North Africa. It is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisia also shares m ...

) ** Merchant Navy Remembrance Day (

) ** Merchant Navy (United Kingdom) ** National Welsh Rarebit Day (

) ** Tokehega Day ( Tokelau,

) * September 4 ** Immigrant's Day (

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

) ** National Macadamia Nut Day (

) ** Newspaper Carrier Day (

) * September 5 ** International Day of Charity ** National Cheese Pizza Day (

) ** Teachers' Day (

) * September 6 ** Armed Forces Day (São Tomé and Príncipe) ** Defence Day or Army Day (Pakistan) **

( Bonaire) **

(Eswatini) ** National Coffee Ice Cream Day (

) ** Unification Day (Bulgaria) * September 7 ** Air Force Day (Pakistan) ** Independence Day (Brazil) ** Military Intelligence Day (Ukraine) ** National Acorn Squash Day (

) ** National Beer Lover's Day (

) ** National Salami Day (

) ** National Threatened Species Day (

) ** Victory Day (

Mozambique Mozambique, officially the Republic of Mozambique, is a country located in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Eswatini and South Afr ...

) * September 8 ** Day of the Battle of Borodino (Russia) ** 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 (

), ( Anglo-Catholicism) *** Monti Fest ( Mangalorean Catholic) ** Victory Day (Pakistan) ** Victory Day (Malta) ** World Physical Therapy Day * September 9 Morning glory

** Armored Forces Day (Ukraine) ** California Admission Day (

, United States) ** Children's Day (Costa Rica) ** Chrysanthemum Day (

) ** Day of the Victims of Holocaust and of Racial Violence (Slovakia) ** Emergency Services Day (United Kingdom) ** Independence Day or Republic Day (North Korea) **

(Tajikistan) from USSR in 1991. ** Martyrs' Day (Afghanistan) (date may fall on September 8, follows a non-Gregorian calendar) ** National Steak Au Poivre Day (United States) ** Remembrance for Herman the Cheruscan ( The Troth) ** Wienerschnitzel Day (United States) * September 10 ** Amerindian Heritage Day (Guyana) ** Children's Day (Honduras) ** National Day (

Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...

) ** National TV Dinner Day (

) ** Saint George's Caye Day (Belize) ** Teachers' Day (China) ** World Suicide Prevention Day * September 11 ** Battle of Tendra Day (Russia) ** Death Anniversary of Quaid-e-Azam Muhammad Ali Jinnah, a former holiday. (Pakistan) ** Emergency Number Day (United States) ** Enkutatash falls on this day if it is not a leap year.(Ethiopia, Rastafari) ** National Day of Catalonia (

Catalonia Catalonia is an autonomous community of Spain, designated as a ''nationalities and regions of Spain, nationality'' by its Statute of Autonomy of Catalonia of 2006, Statute of Autonomy. Most of its territory (except the Val d'Aran) is situate ...

) ** 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 A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) compared to a common year. The 366th day (or 13th month) is added to keep t ...

. (International) ** Defenders Day (

Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...

. (United States) ** Enkutatash falls on this day if it is a leap year. (Ethiopia, Rastafari) ** Mindfulness Day ** National Chocolate Milkshake Day (United States) ** National Day (Cape Verde) ** National Day of Encouragement (United States) * September 13 ** Day of the Programmer, during a non-

. (International) **

Feast of the Cross The Feast of the Holy Cross, or Feast of the Cross, commemorates True Cross, the cross used in the crucifixion of Jesus. In the Christianity, Christian liturgical calendar, there are several different celebrations which honor and celebrate the ...

(

Assyrian Church of the East The Assyrian Church of the East (ACOE), sometimes called the Church of the East and officially known as the Holy Apostolic Catholic Assyrian Church of the East, is an Eastern Christianity, Eastern Syriac Christianity, Syriac Christian denomin ...

) ** '' Día de los Niños Héroes'' (Mexico) **

* *{{cite web, url=http://calendar.ut.ac.ir/, ...

(Mauritius) ** International Chocolate Day ** National Peanut Day (

) * September 14 ** Children's Day (Nepal) (celebrated on the 15th on leap years) **

* *{{cite web, url=http://calendar.ut.ac.ir/, ...

(Romania) **

(Christianity) *** Elevation of the Holy Cross (

Eastern Orthodox Eastern Orthodoxy, otherwise known as Eastern Orthodox Christianity or Byzantine Christianity, is one of the three main Branches of Christianity, branches of Chalcedonian Christianity, alongside Catholic Church, Catholicism and Protestantism ...

) ** Hindi Diwas ( Hindi-speaking regions) ** Mobilized Servicemen Day (Ukraine) ** National Cream Filled Donut Day (

) ** National Eat a Hoagie Day (United States) ** San Jacinto Day (Nicaragua) * September 15 ** Battle of Britain Day (United Kingdom) ** Children's Day (Nepal) (leap years only) **

* *{{cite web, url=http://calendar.ut.ac.ir/, ...

(India) ** Free Money Day (International) **

(Guatemala, El Salvador, Honduras, Nicaragua, and Costa Rica) ** International Day of Democracy ( International) **

(Azerbaijan) ** National Crème de Menthe Day (

) ** National Double Cheeseburger Day (

) ** National Linguine Day (

) ** National Cheese Toast Day (

) ** Patriotic Day (Guatemala) ** Restoration of Primorska to the Motherland Day (Slovenia) ** 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 ** Malaysian Armed Forces Day (Malaysia) ** Malaysia Day (Malaysia, Singapore) ** Martyrs' Day (Libya) ** Heroes' Day (Saint Kitts and Nevis) ** National Cinnamon Raisin Toast Day (

) ** National Guacamole Day (

) * 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) ** National Apple Dumpling Day (

) ** National Monte Cristo Sandwich Day (

) ** 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) ** Island Language Day (

Okinawa Prefecture is the southernmost and westernmost prefecture of Japan. It consists of three main island groups—the Okinawa Islands, the Sakishima Islands, and the Daitō Islands—spread across a maritime zone approximately 1,000 kilometers east to west an ...

, Japan) ** National Cheeseburger Day (

) ** Navy Day (Croatia) ** World Water Monitoring Day ( 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) **

( Saint Kitts and Nevis) ** International Talk Like a Pirate Day ** National Butterscotch Pudding Day (

) * September 20 **

of South Ossetia (not fully recognized) ** National Pepperoni Pizza Day (

) ** National Punch Day (

) ** National Rum Punch Day (

) ** National Youth Day (Thailand) ** Oil Workers' Day (Azerbaijan) ** Universal Children's Day (Germany) * September 21 ** Arbor Day (Brazil) ** Commemoration of the Declaration of Martial Law (

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

) ** Customs Service Day (

) ** Founder's Day and National Volunteer Day (

Ghana Ghana, officially the Republic of Ghana, is a country in West Africa. It is situated along the Gulf of Guinea and the Atlantic Ocean to the south, and shares borders with Côte d’Ivoire to the west, Burkina Faso to the north, and Togo to t ...

) **