In the Northern hemisphere, the beginning of the meteorological autumn is on the 1st of September. In the Southern hemisphere, the beginning of the meteorological spring is on the 1st of September.
September begins on the same day of the week as December every year, because there are 91 days separating September and December, which is a multiple of seven (the number of days in the week). No other month ends on the same day of the week as September in any year. This month and May are the only two months to have this property. April and July of the previous year begin on the same day of the week as September of the current year as a common year, October of the previous year always begins on the same day of the week as September of the current year as a leap year, January of the previous year begins on the same day of the week as September of the current year as a leap year and a year immediately before that. In common years, September ends on the same day of the week as April and December of the previous year while in leap years, September ends on the same day of the week as July of the previous year. In years immediately before common years, September begins on the same day of the week as June of the following year and in years immediately before leap years, September begins on the same day of the week as March and November of the following year. In years immediately before common years, September ends on the same day of the week as March and June of the following year and in years immediately before leap years, September ends on the same day of the week as August and November of the following year.
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. 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.
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.
Events in September
Childhood Cancer Awareness Month
Gynecologic Cancer Awareness Month
Leukemia and Lymphoma Awareness Month
National Ovarian Cancer Month
National Prostate Cancer Awareness Month
Take a Loved One to the Doctor Day (typically the last week in September)
Thyroid Cancer Awareness Month
- National Hispanic Heritage Month
- September 14 was the day that Francis Scott Key wrote The Star-Spangled Banner, the national anthem of the United States
- September 19 is International Talk Like A Pirate Day.
- September 23 is Celebrate Bisexuality Day.
- The equinox named the autumnal equinox in the northern hemisphere and the vernal or spring equinox in the southern hemisphere occurs on dates varying from 21 September to 24 September (in UTC). In the pagan wheel of the year the spring equinox is the time of Ostara and the ] is celebrated on the first Sunday of September.
- In Australia, the Rugby League Grand Final is played on the last Sunday of September.
- In Australia, the AFL Grand Final is played on the last Saturday of September.
- In Brazil, Independence Day is celebrated September 7
- Canada/ USA - Labor Day (Labour Day in Canada) is observed on the first Monday in September in the United States and Canada.
- National Grandparents' Day takes place on the first Sunday after Labor Day in the United States and Canada.
- In Chile, Fiestas Patrias is celebrated on September 18 and September 19.
- In China, Shenyang Incident ～ 18-9-1931 Japan invades China September 18.
- The Chinese August Moon festival (more correctly called the Mid-Autumn Festival) usually occurs in September.
- September 1 is celebrated as the beginning of Eritrea 's 30 year armed struggle for independence from Ethiopia, which began in September 1961 and ended in May 1991.
- As a celebration for the coming October, the traditional harvest month in historic Germany, the German Oktoberfest is celebrated near the end of September.
- In India, Teachers' Day is celebrated on September 5. The date is the birthday of the second President of India, academic philosopher Dr. Sarvepalli Radhakrishnan.
- Italy - On the first Sunday of September, the regata storica parade is staged in Venice, as prelude to the rowing contests known as regattas.
- In Japan, Respect for the Aged Day is a national holiday celebrated on the third Monday of September. Autumnal Equinox Day is also a national holiday.
- In Saint Kitts and Nevis, National Heroes' Day is celebrated September 16.
- In Saint Kitts and Nevis, Independence Day is celebrated September 19.
- In Malaysia, September 16 is celebrated annually as Malaysia Day, the day Sabah, Sarawak, Singapore and Malaya come together and form Federation of Malaysia in 1963.
- In El Salvador, Independence Day is celebrated September 15.
- In Mozambique, Revolution Day is celebrated on September 25.
- In the Netherlands the third Tuesday in September is known as prinsjesdag. The government presents its annual budget. The king rides to the parliament in a gilded coach and reads the plans for the coming year to the States-general.
- Heritage Day is celebrated in South Africa on 24 September.
- In KwaZulu-Natal, king Shaka is commemorated on the last Sunday of September.
- In the United States, September is National Preparedness Month
- In the United States, Hispanic Heritage Month is celebrated from September 15 to October 15.
- California Admission Day to commemorate the admission of California into the Union is September 9.
- German American Heritage Month begins on September 15 in the United States.
- In Uzbekistan, Independence Day is celebrated September 1
- Vietnam's National Day is September 2
- Catalonia's National Day is September 11
- 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.
- September in the Northern Hemisphere is the seasonal equivalent to March in the Southern Hemisphere and vice versa.
- The Ludi Magni (Ludi Romani) of classical Rome in honor of Jupiter, Juno and Minerva began on September 4.
- The principal ecclesiastical feasts falling within the month are: the Nativity of the Blessed Virgin on the 8th, the Exaltation of the Holy Cross on the 14th, St. Matthew the apostle on the 21st, and St. Michael the archangel on the 29th.
- 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.
- The Anglo-Saxons called the month Gerstmonath, barley month, that crop being then usually harvested.
- September is called Herbstmonat, harvest month, in Switzerland.
- The September 11, 2001 attacks on the World Trade Center and the Pentagon.
- Chile's coup d'état against Salvador Allende's government on September 11, 1973.
- Prostate Cancer Awareness Month
- Liver Cancer Awareness month
- September's birthstone is the sapphire.
- The birth flowers for September are the forget-me-not, morning glory and aster.
- The zodiac signs for the month of September are Virgo (until September 21) and Libra (from September 22 onwards).
- Metoffice.gov.uk[dead link]
- 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.
- "Fathers Day in Australia".
- Canada.gr.ca[dead link]
- National Heroes Day (Saint Kitts and Nevis)
- "CIA – The World Factbook – Saint Kitts and Nevis". Cia.gov. Retrieved 2013-08-22.
- "El Salvador's Independence Day – September 15". Presidiolabahia.org. Retrieved 2013-08-22.
- "National Hispanic Heritage Month, 2007". Georgewbush-whitehouse.archives.gov. Retrieved 2013-08-22.
- "Ancestry.com". Ancestry.com. Retrieved 2013-08-22.
- Chisholm, Hugh, ed. (1911). "September". Encyclopædia Britannica (11th ed.). Cambridge University Press.
- SHG Resources. "SHGresources.com". SHGresources.com. Retrieved 2013-08-22.
- "Flowerstower.com". Retrieved 2013-08-22.[dead link]
- The dictionary definition of September at Wiktionary
- Media related to September at Wikimedia Commons
- Quotations related to September at Wikiquote