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{{short description|Ninth month in the Julian and Gregorian calendars}}
{{short description|Ninth month in the Gregorian and Julian calendars}}
{{About|the month|}}
{{About|the month|}}
{{Redirect2|Sep.|Sept.|other uses of Sep.|SEP (disambiguation){{!}}SEP|the family division|Sept}}
{{Redirect2|Sep.|Sept.|other uses of Sep.|SEP (disambiguation){{!}}SEP|the family division|Sept}}
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{{Calendar}}
{{Calendar}}
⚫
'''September''' is the ninth month of the year in the [[Gregorian calendar]] and interchangeably the ninth or tenth month in the less commonly used [[Julian calendar]]. In the modern Gregorian calendar, its length is 30 days.
[[File:Les Très Riches Heures du duc de Berry septembre.jpg|right|thumb|180px|September, from the ''[[Très Riches Heures du Duc de Berry]]'']]
[[File:Les Très Riches Heures du duc de Berry septembre.jpg|right|thumb|September, from the ''[[Très Riches Heures du Duc de Berry]]'']]

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[[File:Liège (3).JPG|right|thumb|180px|[[School]] starts in September in many countries, such as Belgium]]
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[[Image:September WPA poster.jpg|thumb|175px|right|[[Works Progress Administration|WPA]] poster, [[1940]]]]
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[[File:Logansapphire.jpg|thumb|right|175px|[[Sapphire]], September [[birthstone]]]]
⚫
[[File:2008-05-04 at 18-26-44-Forgetmenot-Flower.jpg|thumb|right|175px|[[Forget-me-not]], September birth flower]]

⚫
'''September''' is the ninth month of the year in both the [[Gregorian calendar]] and the less commonly used [[Julian calendar]]. In the modern Gregorian calendar, its length is 30 days.


September in the [[Northern Hemisphere]] and [[March]] in the [[Southern Hemisphere]] are seasonally equivalent.
September in the [[Northern Hemisphere]] and [[March]] in the [[Southern Hemisphere]] are seasonally equivalent.
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In the Northern hemisphere, the beginning of the meteorological [[autumn]] is on 1 September. In the Southern hemisphere, the beginning of the meteorological [[Spring (season)|spring]] is on 1 September.<ref>{{cite web|url=http://www.metoffice.gov.uk/climatechange/guide/effects/seasons.html|archive-url=http://webarchive.nationalarchives.gov.uk/20090225040732/http://www.metoffice.gov.uk/climatechange/guide/effects/seasons.html|url-status=dead|archive-date=2009-02-25|title=Met Office: Changing seasons|first=Met|last=Office|website=webarchive.nationalarchives.gov.uk}}</ref>　
In the Northern hemisphere, the beginning of the meteorological [[autumn]] is on 1 September. In the Southern hemisphere, the beginning of the meteorological [[Spring (season)|spring]] is on 1 September.<ref>{{cite web|url=http://www.metoffice.gov.uk/climatechange/guide/effects/seasons.html|archive-url=http://webarchive.nationalarchives.gov.uk/20090225040732/http://www.metoffice.gov.uk/climatechange/guide/effects/seasons.html|url-status=dead|archive-date=2009-02-25|title=Met Office: Changing seasons|first=Met|last=Office|website=webarchive.nationalarchives.gov.uk}}</ref>　


September marks the beginning of the [[Eastern Orthodox liturgical calendar|ecclesiastical year]] in the [[Eastern Orthodox Church]]. It is the start of the [[academic term|academic year]] in many countries of the northern hemisphere, in which children go back to school after the [[Summer vacation|summer break]], sometimes on [[September 1|the first day of the month]].
September marks the beginning of the [[Eastern Orthodox liturgical calendar|ecclesiastical year]] in the [[Eastern Orthodox Church]]. It is the start of the [[academic term|academic year]] in many countries of the northern hemisphere, in which children go back to school after the [[Summer vacation|summer break]], sometimes on [[September 1|the first day of the month]]. Some [[Libra (astrology)|Libras]]
and [[Virgo (astrology)|Virgos]] are born in September, with Virgos being born on [[September 1st]] through [[September 22nd]] and Libras [[September 23rd]] through [[September 30]].


[[September (Roman month)|September]] (from Latin ''septem'', "seven") was originally the seventh of ten months in the oldest known [[Roman calendar]], the [[Roman calendar#Legendary 10-month calendar|calendar of Romulus]] {{circa|750 BC}}, with March (Latin ''[[Martius (month)|Martius]]'') the first month of the year until perhaps as late as 451 BC.<ref>[[H.H. Scullard]], ''Festivals and Ceremonies of the Roman Republic'' (Cornell University Press, 1981), p.&nbsp;84; Gary Forsythe, ''Time in Roman Religion: One Thousand Years of Religious History'' (Routledge, 2012), p.&nbsp;14.</ref> After the calendar reform that added [[Ianuarius|January]] and [[Februarius|February]] 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.
[[September (Roman month)|September]] (from Latin ''septem'', "seven") was originally the seventh month in the oldest known [[Roman calendar]], the [[Roman calendar#Legendary 10-month calendar|calendar of Romulus]] {{circa|750 BC}}, with March being (Latin ''[[Martius (month)|Martius]]'') the first month of the year until perhaps as late as 451 BC.<ref>[[H.H. Scullard]], ''Festivals and Ceremonies of the Roman Republic'' (Cornell University Press, 1981), p.&nbsp;84; Gary Forsythe, ''Time in Roman Religion: One Thousand Years of Religious History'' (Routledge, 2012), p.&nbsp;14.</ref> After the calendar reform that added [[Ianuarius|January]] and [[Februarius|February]] 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 ==
== Events ==
[[Ancient Roman]] observances for September include [[Ludi Romani]], 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]] was held on September 13. [[Ludi Triumphales]] was held from September 18–22. The [[Septimontium]] was celebrated in September, and on December 11 on later calendars. These dates do not correspond to the modern Gregorian calendar.
[[Ancient Roman]] observances for September include [[Ludi Romani]], 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]] was held on September 13. [[Ludi Triumphales]] was held from September 18–22. The [[Septimontium]] was celebrated in September, and on December 11 on later calendars. These dates do not correspond to the modern Gregorian calendar.


September was called "harvest month" in [[Charlemagne]]'s calendar. September corresponds partly to the [[Fructidor]] and partly to the [[Vendémiaire]] of the [[First French Republic|first French republic]]. September is called ''Herbstmonat'', harvest month, in Switzerland. The [[Anglo-Saxon]]s called the month ''Gerstmonath'', barley month, that crop being then usually harvested.<ref>{{EB1911|inline=y|wstitle=September|volume=24|page=653}}</ref>
September was called the "harvest month" in [[Charlemagne]]'s calendar. September corresponds partly to the [[Fructidor]] and partly to the [[Vendémiaire]] of the [[First French Republic|first French republic]]. September is called ''Herbstmonat'', harvest month, in Switzerland. The [[Anglo-Saxon]]s called the month ''Gerstmonath'', barley month, that crop being then usually harvested.<ref>{{EB1911|inline=y|wstitle=September|volume=24|page=653}}</ref>


In 1752, the [[British Empire]] adopted the [[Gregorian calendar]]. In the British Empire that year, [[September 2]] was immediately followed by [[September 14]].
In 1752, the [[British Empire]] adopted the [[Gregorian calendar]]. In the British Empire that year, [[September 2]] was immediately followed by [[September 14]].
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On [[Usenet]], it is said that September 1993 ([[Eternal September]]) never ended.
On [[Usenet]], 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).<ref>{{Cite web |title=The most common birthday is around the corner. Here's where yours falls on the list. |url=https://www.usatoday.com/story/news/2022/11/29/most-common-birthday/10765423002/ |access-date=2023-09-09 |website=USA TODAY |language=en-US}}</ref><ref>{{Cite web |last=Specktor |first=Brandon |last2= |last3= |first3= |last4= |date=2020-09-17 |title=Why September Is the Most Popular Month for Birthdays? |url=https://www.rd.com/article/september-popular-birth-month/ |access-date=2023-09-09 |website=Reader's Digest |language=en-US}}</ref><ref>{{Cite web |date=2023-09-08 |title=Happy birthday to you and you and you: Why Sept. 9 is the most common birthday |url=https://www.today.com/parents/family/most-common-birthday-rcna104134 |access-date=2023-09-09 |website=TODAY.com |language=en}}</ref>
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).<ref>{{Cite web |title=The most common birthday is around the corner. Here's where yours falls on the list. |url=https://www.usatoday.com/story/news/2022/11/29/most-common-birthday/10765423002/ |access-date=2023-09-09 |website=USA TODAY |language=en-US}}</ref><ref>{{Cite web |last=Specktor |first=Brandon |date=2020-09-17 |title=Why September Is the Most Popular Month for Birthdays? |url=https://www.rd.com/article/september-popular-birth-month/ |access-date=2023-09-09 |website=Reader's Digest |language=en-US}}</ref><ref>{{Cite web |date=2023-09-08 |title=Happy birthday to you and you and you: Why Sept. 9 is the most common birthday |url=https://www.today.com/parents/family/most-common-birthday-rcna104134 |access-date=2023-09-09 |website=TODAY.com |language=en}}</ref>


== Astronomy and astrology ==
== Astronomy and astrology ==

The [[September equinox]] takes place in this month, and certain observances are organized around it. It is the [[Autumn equinox (northern hemisphere)|Autumn equinox]] in the Northern Hemisphere, and the [[Vernal equinox (southern hemisphere)|Vernal equinox]] in the Southern Hemisphere. The dates can vary from 21 September to 24 September (in [[UTC]]).
The [[September equinox]] takes place in this month, and certain observances are organized around it. It is the [[Autumn equinox (northern hemisphere)|Autumn equinox]] in the Northern Hemisphere, and the [[Vernal equinox (southern hemisphere)|Vernal equinox]] in the Southern Hemisphere. The dates can vary from 21 September to 24 September (in [[UTC]]).


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== Symbols ==
== Symbols ==
September's [[birthstone]] is the [[sapphire]]. The birth flowers are the [[forget-me-not]], [[morning glory]] and [[aster (genus)|aster]].<ref>{{cite web |author= SHG Resources |url= http://www.shgresources.com/gems/birthflowers |title= SHGresources.com |publisher= SHGresources.com |access-date= 2013-08-22 |archive-date= 2013-06-16 |archive-url= https://web.archive.org/web/20130616154403/http://www.shgresources.com/gems/birthflowers/ |url-status= dead }}</ref><ref>{{cite web|url=http://www.flowerstower.com/singleflower.php?name=Forget-me-not |title=Flowerstower.com |access-date=2013-08-22 |url-status=dead |archive-url=https://web.archive.org/web/20130224103640/http://www.flowerstower.com/singleflower.php?name=Forget-me-not |archive-date=February 24, 2013 }}</ref> The [[zodiac]] signs are [[Virgo (astrology)|Virgo]] (until September 22) and [[Libra (astrology)|Libra]] (September 23 onward).<ref>The Earth passes the junction of the signs at 13:30 UT/GMT September 22, 2020, and will pass it again at 19:21 UT/GMT September 22, 2021.</ref><ref name=astrology>{{citation |title=Astrology Calendar |url=https://www.yourzodiacsign.com/calendar/ |website=yourzodiacsign}}. Signs in UT/GMT for 1950–2030.</ref>
September's [[birthstone]] is the [[sapphire]]. The birth flowers are the [[forget-me-not]], [[morning glory]] and [[aster (genus)|aster]].<ref>{{cite web |author= SHG Resources |url= http://www.shgresources.com/gems/birthflowers |title= SHGresources.com |publisher= SHGresources.com |access-date= 2013-08-22 |archive-date= 2013-06-16 |archive-url= https://web.archive.org/web/20130616154403/http://www.shgresources.com/gems/birthflowers/ |url-status= dead }}</ref><ref>{{cite web|url=http://www.flowerstower.com/singleflower.php?name=Forget-me-not |title=Flowerstower.com |access-date=2013-08-22 |url-status=dead |archive-url=https://web.archive.org/web/20130224103640/http://www.flowerstower.com/singleflower.php?name=Forget-me-not |archive-date=February 24, 2013 }}</ref> The [[zodiac]] signs are [[Virgo (astrology)|Virgo]] (until September 22) and [[Libra (astrology)|Libra]] (September 23 onward).<ref>The Earth passes the junction of the signs at 13:30 UT/GMT September 22, 2020, and will pass it again at 19:21 UT/GMT September 22, 2021.</ref><ref name=astrology>{{citation |title=Astrology Calendar |url=https://www.yourzodiacsign.com/calendar/ |website=yourzodiacsign}}. Signs in UT/GMT for 1950–2030.</ref>

[[File:Logansapphire.jpg|thumb|Sapphire]] [[File:Morning glory.jpg|alt=Morning glories|thumb|[[Morning glory|Morning glories]]]][[File:Aster amellus - blooms (aka).jpg|alt=Asters|thumb|[[Aster (genus)|Asters]]]]


== Observances ==
== Observances ==
{{List to table|date=August 2024}}<!-- Are the other months using tables? -->
''This list does not necessarily imply either official status or general observance.''
''This list does not necessarily imply either official status or general observance.''


⚫
[[File:Logansapphire.jpg|thumb|right|[[Sapphire]], September [[birthstone]]]]
=== Non-Gregorian ===
=== Non-Gregorian ===


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*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>
*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>
*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 }}</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 ====
==== United States ====
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=== Movable Gregorian ===
=== 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)]]
*[[Engineer's Day|Engineering Day (Egypt)]]
*[[White Balloon Day]]
*[[White Balloon Day]]
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==== Nearest weekday to September 12 ====
==== Nearest weekday to September 12 ====
*[[Battle of Saragarhi#Saragarhi Day|Saragarhi Day]] ([[Sikhism]])
*[[Battle of Saragarhi#Saragarhi Day|Saragarhi Day]] ([[Sikhism]])
*[[Patriot Day]] ([[United States]])


==== Second Saturday ====
==== Second Saturday ====
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==== Third Friday ====
==== Third Friday ====
*[[National POW/MIA Recognition Day]] ([[United States]]) [[File:POW-MIA flag.jpg|thumb|POW☆​​MIA Flag.]]
*[[National POW/MIA Recognition Day]] ([[United States]])
[[File:POW-MIA flag.jpg|thumb|POW☆​​MIA Flag.]]

==== Third Saturday ====
==== Third Saturday ====
*[[National Cleanup Day]] (United States)
*[[National Cleanup Day]] (United States)
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=== Fixed Gregorian ===
=== Fixed Gregorian ===
⚫
[[File:Liège (3).JPG|right|thumb|[[School]] starts in September in many countries, such as Belgium]]
*[[September 1]]
*[[September 1]]
**[[List of holidays by country#Eritrea|Anniversary of the Start of the Armed Struggle]] ([[Eritrea]])
**[[List of holidays by country#Eritrea|Anniversary of the Start of the Armed Struggle]] ([[Eritrea]])
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**[[World Physical Therapy Day]]
**[[World Physical Therapy Day]]
*[[September 9]]
*[[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)
**[[Armed Forces of Ukraine#Military holidays|Armored Forces Day]] (Ukraine)
**[[California Admission Day]] ([[California]], United States)
**[[California Admission Day]] ([[California]], United States)
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**[[Public holidays in Cape Verde|National Day]] (Cape Verde)
**[[Public holidays in Cape Verde|National Day]] (Cape Verde)
**[[National Day of Encouragement]] (United States)
**[[National Day of Encouragement]] (United States)
**[[Battle of Saragarhi#Saragarhi Day|Saragarhi Day]] ([[Sikhism]]) (this day or nearest weekday, 2015 date: September 11)
*[[September 13]]
*[[September 13]]
**[[Day of the Programmer]], during a non-[[leap year]]. (International)
**[[Day of the Programmer]], during a non-[[leap year]]. (International)
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**[[Battle of San Jacinto (1856)|San Jacinto Day]] (Nicaragua)
**[[Battle of San Jacinto (1856)|San Jacinto Day]] (Nicaragua)
*[[September 15]]
*[[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]] (United Kingdom)
**[[Battle of Britain#Battle of Britain Day|Battle of Britain Day]] (United Kingdom)
**[[Children's Day#Nepal|Children's Day]] (Nepal) (leap years only)
**[[Children's Day#Nepal|Children's Day]] (Nepal) (leap years only)
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**[[Republic Day (Trinidad and Tobago)]]
**[[Republic Day (Trinidad and Tobago)]]
*[[September 25]]
*[[September 25]]
⚫
[[Image:September WPA poster.jpg|thumb|right|[[Works Progress Administration|WPA]] poster, [[1940]]]]
**[[Harki|Day of National Recognition for the Harkis]] ([[France]])
**[[Harki|Day of National Recognition for the Harkis]] ([[France]])
**[[List of food days#Germany|German Butterbrot Day]] ([[Germany]])
**[[List of food days#Germany|German Butterbrot Day]] ([[Germany]])

Revision as of 03:04, 20 September 2024

This article is about the month. For other uses, see September (disambiguation).
"Sep." and "Sept." redirect here. For other uses of Sep., see SEP. For the family division, see Sept.
<< September >>
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08 09 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30  
2024

September is the ninth month of the year in the Gregorian calendar and interchangeably the ninth or tenth month in the less commonly used Julian calendar. In the modern Gregorian calendar, its length is 30 days.

September, from the Très Riches Heures du Duc de Berry

September in the Northern Hemisphere and March 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.[1]　

September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church. 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 through September 30.

September (from Latin septem, "seven") was originally the seventh month in the oldest known Roman calendar, the calendar of Romulus c. 750 BC, with March being (Latin Martius) the first month of the year until perhaps as late as 451 BC.[2] After the calendar reform that added January and February 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 observances for September include Ludi Romani, 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 was held on September 13. Ludi Triumphales was held from September 18–22. The Septimontium 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's calendar. September corresponds partly to the Fructidor and partly to the Vendémiaire of the first French republic. September is called Herbstmonat, harvest month, in Switzerland. The Anglo-Saxons called the month Gerstmonath, barley month, that crop being then usually harvested.[3]

In 1752, the British Empire adopted the Gregorian calendar. In the British Empire that year, September 2 was immediately followed by September 14.

On Usenet, 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).[4][5][6]

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 is the sapphire. The birth flowers are the forget-me-not, morning glory and aster.[7][8] The zodiac signs are Virgo (until September 22) and Libra (September 23 onward).[9][10]

Observances

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

Sapphire, September birthstone

Non-Gregorian

Month-long

United States

Food months

Movable Gregorian

Forget-me-not, September birth flower

First Wednesday

First Thursday

First Friday

First Sunday

First Sunday after September 4

Week of the first Monday

Week of September 10

First Monday

Nearest weekday to September 12

Second Saturday

Saturday after first Monday

Second Sunday

First Sunday after first Monday

Week of September 17

Third Tuesday

September 17 but observed on previous Friday if it falls on a Saturday or following Monday if on a Sunday

Third Friday

POW☆​​MIA Flag.

Third Saturday

Weekend of the week of September 17

Third Sunday

Week of Sunday before September 23

Week of September 22

Last week

Last full week

Third Monday

Pertaining to the September Equinox

Fourth Friday

Last Friday

Last Saturday

Last Sunday

Fourth Monday

Last Wednesday

Last weekday

Fixed Gregorian

School starts in September in many countries, such as Belgium
Morning glories
Morning glories, one of the birth flowers of September.
Asters
Asters, a September birth flower.
WPA poster, 1940

References

  1. ^ Office, Met. "Met Office: Changing seasons". webarchive.nationalarchives.gov.uk. Archived from the original on 2009-02-25.
  2. ^ H.H. Scullard, Festivals and Ceremonies of the Roman Republic (Cornell University Press, 1981), p. 84; Gary Forsythe, Time in Roman Religion: One Thousand Years of Religious History (Routledge, 2012), p. 14.
  3. ^  One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "September". Encyclopædia Britannica. Vol. 24 (11th ed.). Cambridge University Press. p. 653.
  4. ^ "The most common birthday is around the corner. Here's where yours falls on the list". USA TODAY. Retrieved 2023-09-09.
  5. ^ Specktor, Brandon (2020-09-17). "Why September Is the Most Popular Month for Birthdays?". Reader's Digest. Retrieved 2023-09-09.
  6. ^ "Happy birthday to you and you and you: Why Sept. 9 is the most common birthday". TODAY.com. 2023-09-08. Retrieved 2023-09-09.
  7. ^ SHG Resources. "SHGresources.com". SHGresources.com. Archived from the original on 2013-06-16. Retrieved 2013-08-22.
  8. ^ "Flowerstower.com". Archived from the original on February 24, 2013. Retrieved 2013-08-22.
  9. ^ The Earth passes the junction of the signs at 13:30 UT/GMT September 22, 2020, and will pass it again at 19:21 UT/GMT September 22, 2021.
  10. ^ "Astrology Calendar", yourzodiacsign. Signs in UT/GMT for 1950–2030.
  11. ^ a b "Cancer Awareness Month :: Society of Gynecologic Nurse Oncologists". www.sgno.org.
  12. ^ "September Is Leukemia and Lymphoma Awareness Month" (PDF). Archived from the original (PDF) on 2015-09-05. Retrieved 2016-08-19.
  13. ^ Baunfire.com, Spark CMS by. "September Is Thyroid Cancer Awareness Month – ThyCa: Thyroid Cancer Survivors' Association, Inc". www.thyca.org.
  14. ^ "Promote National Suicide Prevention Month". suicidepreventionlifeline.org. Retrieved 2019-11-25.
  15. ^ "Fruit & Veg Month - Healthy Kids". 8 October 2013.
  16. ^ a b c d e f g h i j "Food Days, Weeks, Months – September". UNL Food. University of Nebraska–Lincoln.
  17. ^ Goldstein, Darra (2011). "National Turkey Day". Gastronomica. 11 (4): iii–iv. doi:10.1525/gfc.2012.11.4.iii.
  18. ^ "September is Hydrocephalus Awareness Month! Here's What You Can Do…". Hydrocephalus Association. Retrieved 29 July 2016.
  19. ^ "California Wine Month – California Wines". www.discovercaliforniawines.com. Archived from the original on 2018-11-27. Retrieved 2016-08-20.
  20. ^ "September Monthly Observations". 4 January 2016.
  21. ^ "Home » te Wiki o te Reo Māori". Archived from the original on 2020-02-06. Retrieved 2020-02-05.
  • The dictionary definition of September at Wiktionary
  • Media related to September at Wikimedia Commons
  • Quotations related to September at Wikiquote
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