September

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School starts in September in many countries, such as here, in Belgium
WPA poster, 1940
Sapphire, September birthstone
Forget-me-not, September birth flower

September is the ninth month of the year in the Julian and Gregorian calendars, the third of four months to have a length of 30 days, and the fourth of five months to have a length of less than 31 days. In the Northern Hemisphere September is the seasonal equivalent of March in the Southern Hemisphere.

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, in which children go back to school after the summer break, sometimes on the first day of the month.

September (from Latin septem, "seven") was originally the seventh of ten months on the oldest known Roman calendar, with March (Latin Martius) the first month of the year until perhaps as late as 153 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.

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

September was called "harvest month" in Charlemagne's calendar.[3] September corresponds partly to the Fructidor and partly to the Vendémiaire of the first French republic.[3]On Usenet, it is said that September 1993 (Eternal September) never ended. September is called Herbstmonat, harvest month, in Switzerland.[3] The Anglo-Saxons called the month Gerstmonath, barley month, that crop being then usually harvested.[3]

September in Astronomy and Astrology

Meteor showers that occur in September include the Aurigids, the Delta Aurigids which occur from mid-September to early October, the Southern Taurids, which occur from September 10 to November 20, and the Andromedids which occur from September 25 – December 25.

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.

Other Languages
Afrikaans: September
Alemannisch: September
አማርኛ: ሰፕቴምበር
Ænglisc: Hāligmōnaþ
Аҧсшәа: Цәыббра
العربية: سبتمبر
aragonés: Setiembre
ܐܪܡܝܐ: ܐܝܠܘܠ
armãneashti: Yizmâciunu
arpetan: Septembro
অসমীয়া: ছেপ্টেম্বৰ
asturianu: Setiembre
Atikamekw: Kakone pisimw
Avañe'ẽ: Jasyporundy
авар: Сентябр
Aymar aru: Llamp'u phaxsi
azərbaycanca: Sentyabr
Bahasa Banjar: Siptimbir
Bân-lâm-gú: 9 goe̍h
башҡортса: Сентябрь
беларуская: Верасень
беларуская (тарашкевіца)‎: Верасень
भोजपुरी: सितंबर
Bikol Central: Setyembre
български: Септември
Boarisch: Septemba
bosanski: Septembar
brezhoneg: Gwengolo
català: Setembre
Чӑвашла: Авăн уйăхĕ
Cebuano: Septiyembre
čeština: Září
chiShona: Gunyana
chiTumbuka: Seputembala
corsu: Settembre
Cymraeg: Medi
dansk: September
davvisámegiella: Čakčamánnu
Deitsch: September
Deutsch: September
ދިވެހިބަސް: ސެޕްޓެމްބަރު
dolnoserbski: September
डोटेली: असोज
eesti: September
Ελληνικά: Σεπτέμβριος
emiliàn e rumagnòl: Setèmber
эрзянь: Таштамков
español: Septiembre
Esperanto: Septembro
estremeñu: Setiembri
euskara: Irail
eʋegbe: Anyɔnyɔ
فارسی: سپتامبر
Fiji Hindi: September
føroyskt: September
français: Septembre
Frysk: Septimber
furlan: Setembar
Gagauz: Ceviz ay
Gàidhlig: An t-Sultain
galego: Setembro
ГӀалгӀай: Михий бутт
贛語: 九月
ગુજરાતી: સપ્ટેમ્બર
客家語/Hak-kâ-ngî: 9-ngie̍t
хальмг: Һаха сар
한국어: 9월
Hausa: Satumba
Hawaiʻi: Kepakemapa
հայերեն: Սեպտեմբեր
हिन्दी: सितम्बर
hornjoserbsce: September
hrvatski: Rujan
Bahasa Hulontalo: September
Igbo: Septemba
Ilokano: Septiembre
বিষ্ণুপ্রিয়া মণিপুরী: সেপ্টেম্বর
Bahasa Indonesia: September
interlingua: Septembre
Interlingue: Septembre
ᐃᓄᒃᑎᑐᑦ/inuktitut: ᓯᑎᒻᐳᕆ
isiXhosa: Eyomsintsi
íslenska: September
italiano: Settembre
עברית: ספטמבר
Basa Jawa: Sèptèmber
Kabɩyɛ: Salaŋ fenaɣ
kalaallisut: Septemberi
Kapampangan: Septiembri
ქართული: სექტემბერი
कॉशुर / کٲشُر: سیٚپٹَمبَر
kaszëbsczi: Séwnik
қазақша: Қыркүйек
kernowek: Mis Gwyngala
Kinyarwanda: Nzeri
Kiswahili: Septemba
Kreyòl ayisyen: Septanm
kurdî: Rezber
Кыргызча: Сентябрь
кырык мары: Сентябрь
Ladino: Septembre
лакку: Сентябрь
ລາວ: ກັນຍາ
latgaļu: Rudiņa mieness
Latina: September
latviešu: Septembris
Lëtzebuergesch: September
лезги: Сентябрь
lietuvių: Rugsėjis
Ligure: Settembre
Limburgs: September
Livvinkarjala: Syvyskuu
lumbaart: Setember
magyar: Szeptember
मैथिली: सितम्बर
македонски: Септември
Malagasy: Septambra
മലയാളം: സെപ്റ്റംബർ
Malti: Settembru
Māori: Mahuru
მარგალური: ეკენია
مصرى: سبتمبر
Bahasa Melayu: September
Baso Minangkabau: September
Mìng-dĕ̤ng-ngṳ̄: 9 nguŏk
мокшень: Тюжягов
မြန်မာဘာသာ: စက်တင်ဘာ
Na Vosa Vakaviti: Sepiteba
Nederlands: September
Nedersaksies: September
नेपाली: सेप्टेम्बर
नेपाल भाषा: सेप्टेम्बर
日本語: 9月
Napulitano: Settembre
нохчийн: Сентябрь
Nordfriisk: September
Norfuk / Pitkern: Septemba
norsk: September
norsk nynorsk: September
Nouormand: Septembre
Novial: Septembre
occitan: Setembre
олык марий: Идым (тылзе)
oʻzbekcha/ўзбекча: Sentabr
ਪੰਜਾਬੀ: ਸਤੰਬਰ
Pangasinan: Setyembre
پنجابی: ستمبر
پښتو: سپټمبر
Перем Коми: Сентяб
ភាសាខ្មែរ: ខែកញ្ញា
Piemontèis: Stèmber
Tok Pisin: Septemba
Plattdüütsch: September
polski: Wrzesień
Ποντιακά: Σταυρίτες
português: Setembro
Qaraqalpaqsha: Sentyabr
qırımtatarca: Sentâbr
Ripoarisch: Sepptämmber
română: Septembrie
Runa Simi: Tarpuy killa
русиньскый: Септембер
русский: Сентябрь
саха тыла: Балаҕан ыйа
Gagana Samoa: Setema
संस्कृतम्: सितम्बर
sardu: Cabidanni
Scots: September
Sesotho sa Leboa: Lewedi
shqip: Shtatori
sicilianu: Sittèmmiru
Simple English: September
سنڌي: سيپٽمبر
SiSwati: ÍNyoni
slovenčina: September
slovenščina: September
ślůnski: Wrześyń
Soomaaliga: Sebteembar
کوردی: ئەیلوول
српски / srpski: Септембар
srpskohrvatski / српскохрватски: Septembar
Basa Sunda: Séptémber
suomi: Syyskuu
svenska: September
Tagalog: Setyembre
Taqbaylit: Ctamber
tarandíne: Settèmmre
татарча/tatarça: Сентябрь
తెలుగు: సెప్టెంబర్
tetun: Setembru
тоҷикӣ: Сентябр
ᏣᎳᎩ: ᏚᎵᏍᏗ
Türkçe: Eylül
Türkmençe: Sentýabr
Twi: Ewo
удмурт: Куарусён
українська: Вересень
اردو: ستمبر
ئۇيغۇرچە / Uyghurche: مىزان
Vahcuengh: 9 nyied
vèneto: Setenbre
vepsän kel’: Sügüz'ku
Tiếng Việt: Tháng chín
Volapük: Setul
Võro: Süküskuu
walon: Setimbe
West-Vlams: September
Winaray: Septyembre
Wolof: Satumbar
吴语: 9月
Xitsonga: Ndzhati
ייִדיש: סעפטעמבער
粵語: 9月
Zazaki: Keşkelun
žemaitėška: Siejė
中文: 9月