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'''September''' is the ninth month of the year in the [[Julian calendar|Julian]] and [[Gregorian calendar]]s. Its length is 30 days.
'''September''' is the ninth month of the year in the [[Julian calendar|Julian]] and [[Gregorian calendar]]s. Its length is 30 days.
[[File:Les Très Riches Heures du duc de Berry septembre.jpg|right|thumb|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]]'']]
[[File:09 September - Percent of global area at temperature records - Global warming - NOAA.svg |thumb |In recent decades, the number of warm temperature records in September has outpaced cold temperature records over a growing portion of Earth's surface.<ref>{{cite web |title=Mean Monthly Temperature Records Across the Globe |url=https://www.ncei.noaa.gov/access/monitoring/monthly-report/global/202501/supplemental/page-3 |publisher=National Centers for Environmental Information (NCEI) of the National Oceanic and Atmospheric Administration (NOAA) }} Link is an example for one month; for other months, change the "202501" in the preceding URL to '''yyyymm''', where '''yyyy''' is the four-digit year and '''mm''' is the two-digit month (01=January through 12=December)</ref>]]


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. 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]]. Some [[Libra (astrology)|Libras]]
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]].
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 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.
[[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 ==
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''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:Sapphire ring.jpg|thumb|[[Sapphire]], a [[birthstone]] of September ]]


[[File:Logansapphire.jpg|thumb|right|[[Sapphire]], September [[birthstone]]]]
=== Non-Gregorian ===
=== Non-Gregorian ===
* [[List of observances set by the Bahá'í calendar]]
* [[List of observances set by the Bahá'í calendar]]
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* [[National Honey Month]]
* [[National Honey Month]]
* [[Mushroom Council#National Mushroom Month|National Mushroom 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 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 Papaya Month<ref name="unl-sep" />
* National Potato Month<ref name="unl-sep" />
* National Potato Month<ref name="unl-sep" />
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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]]
[[File:2008-05-04 at 18-26-44-Forgetmenot-Flower.jpg|thumb|right|[[Forget-me-not]], the birth flower of September]]
* [[Engineer's Day|Engineering Day (Egypt)]]
* [[Engineer's Day|Engineering Day (Egypt)]]
* [[White Balloon Day]]
* [[White Balloon Day]]
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==== First Sunday after September 4 ====
==== First Sunday after September 4 ====
* [[Wakes Week]] (Parts of [[England]] and [[Scotland]])
* [[Wakes Week]] (Parts of [[England]] and [[Scotland]])
** [[Abbots Bromley Horn Dance]] ([[Abbots Bromley]], [[Staffordshire]], [[England]])
** [[Abbots Bromley Horn Dance]] ([[Abbots Bromley]], [[Staffordshire]], England)


==== Week of the first Monday ====
==== Week of the first Monday ====
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* [[Public holidays in Russia#Popular holidays which are not public holidays|Tanker's Day]] ([[Russia]])
* [[Public holidays in Russia#Popular holidays which are not public holidays|Tanker's Day]] ([[Russia]])
* [[Public holidays in Turkmenistan|Turkmen Bakhshi Day]] ([[Turkmenistan]])
* [[Public holidays in Turkmenistan|Turkmen Bakhshi Day]] ([[Turkmenistan]])
* International Crane Day<ref>{{Cite web | title=Holiday Calendar - International Crane Day - September 10 | url=https://webplus.info/index.php?page=340&event=204615 | archive-url=https://web.archive.org/web/20230603004127/https://webplus.info/index.php?page=340&event=204615 | access-date=2025-08-28 | archive-date=2023-06-03}}</ref>


==== First Sunday after first Monday ====
==== First Sunday after first Monday ====
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==== Week of September 17 ====
==== Week of September 17 ====
* [[Celebrate Freedom Week]] ([[Kansas]] and [[Texas]], [[United States]])
* [[Celebrate Freedom Week]] ([[Kansas]] and [[Texas]], United States)


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


==== Third Friday ====
==== Third Friday ====
* [[National POW/MIA Recognition Day]] ([[United States]])
* [[National POW/MIA Recognition Day]] ([[United States]])
[[File:United States POW-MIA flag.svg|thumb|POW☆MIA Flag.]]
[[File:United States POW-MIA flag.svg|thumb|POW☆MIA Flag.]]
==== Third Saturday ====
==== Third Saturday ====
* [[National Cleanup Day]] (United States)
* [[National Cleanup Day]] (United States)
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==== Third Sunday ====
==== Third Sunday ====
* [[Day of the Walloon Region]] ([[Wallonia]], [[Belgium]])
* [[Day of the Walloon Region]] ([[Wallonia]], Belgium)
* [[Father's Day]] ([[Ukraine]])
* [[Father's Day]] ([[Ukraine]])
* [[Federal Day of Thanksgiving, Repentance and Prayer]] ([[Switzerland]])
* [[Federal Day of Thanksgiving, Repentance and Prayer]] ([[Switzerland]])
* [[Warachikuy]] ([[Cusco]], [[Peru]])
* [[Warachikuy]] ([[Cusco]], Peru)


==== Week of Sunday before September 23 ====
==== Week of Sunday before September 23 ====
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* [[National forest week|National Forest Week]] ([[Canada]])
* [[National forest week|National Forest Week]] ([[Canada]])
** [[Arbor Day#Canada|National Tree Day]] (Wednesday of last full week):
** [[Arbor Day#Canada|National Tree Day]] (Wednesday of last full week):
* [[Celebrate Freedom Week]] ([[Arkansas]] and [[Florida]], [[United States]])
* [[Celebrate Freedom Week]] ([[Arkansas]] and [[Florida]], United States)


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


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


==== Last Wednesday ====
==== Last Wednesday ====
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** [[Merchant Navy (United Kingdom)]]
** [[Merchant Navy (United Kingdom)]]
** [[List of food days#September|National Welsh Rarebit Day]] ([[United States]])
** [[List of food days#September|National Welsh Rarebit Day]] ([[United States]])
** [[Public holidays in Tokelau|Tokehega Day]] ([[Tokelau]], [[New Zealand]])
** [[Public holidays in Tokelau|Tokehega Day]] ([[Tokelau]], New Zealand)
* [[September 4]]
* [[September 4]]
** [[Immigration to Argentina|Immigrant's Day]] ([[Argentina]])
** [[Immigration to Argentina|Immigrant's Day]] ([[Argentina]])
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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.]]
[[File:Morning glory.jpg|alt=Morning glories|thumb|[[Morning glory|Morning glories]], a birth flower 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)

Latest revision as of 08:41, 19 October 2025

Template:Short description Script error: No such module "about". Script error: No such module "Redirect hatnote". Template:Pp-move Template:Calendar/table September is the ninth month of the year in the Julian and Gregorian calendars. Its length is 30 days.

File:Les Très Riches Heures du duc de Berry septembre.jpg
September, from the Très Riches Heures du Duc de Berry
File:09 September - Percent of global area at temperature records - Global warming - NOAA.svg
In recent decades, the number of warm temperature records in September has outpaced cold temperature records over a growing portion of Earth's surface.[1]

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.[2]

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 Template:Circa, with March being (Latin Martius) the first month of the year until perhaps as late as 451 BC.[3] 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.[4]

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).[5][6][7]

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.[8][9] The zodiac signs are Virgo (until September 22) and Libra (September 23 onward).[10][11]

Observances

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

File:Sapphire ring.jpg
Sapphire, a birthstone of September

Non-Gregorian

Month-long

United States

Food months

Movable Gregorian

File:2008-05-04 at 18-26-44-Forgetmenot-Flower.jpg
Forget-me-not, the birth flower of September

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

File:United States POW-MIA flag.svg
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

File:Liège (3).JPG
School starts in September in many countries, such as Belgium
Morning glories
Morning glories, a birth flower of September
Asters
Asters, a September birth flower.
File:September WPA poster.jpg
WPA poster, 1940

References

Template:Reflist

External links

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Template:Authority control

  1. ↑ Script error: No such module "citation/CS1". Link is an example for one month; for other months, change the "202501" in the preceding URL to yyyymm, where yyyy is the four-digit year and mm is the two-digit month (01=January through 12=December)
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ 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.
  4. ↑ File:Wikisource-logo.svg One or more of the preceding sentences incorporates text from a publication now in the public domain: Script error: No such module "template wrapper".
  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".
  10. ↑ 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.
  11. ↑ Script error: No such module "citation/CS1".. Signs in UT/GMT for 1950–2030.
  12. ↑ a b Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
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  17. ↑ a b c d e f g h i j Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "Citation/CS1".
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  21. ↑ Script error: No such module "citation/CS1".
  22. ↑ Script error: No such module "citation/CS1".
  23. ↑ Script error: No such module "citation/CS1".
  24. ↑ Script error: No such module "citation/CS1".
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