September is the ninth month of the year in the Gregorian Calendar and one of four Gregorian months with 30 days.

In Latin, septem means "seven" and septimus means "seventh"; September was in fact the seventh month of the Roman calendar until 153 BC, when the first month changed from Kalendas Martius (1 March) to Kalendas Januarius (1 January).
In the Northern hemisphere, the beginning of the meteorological autumn is 1 September.

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

Events in September

• It is the start of the academic year in many countries in the Northern Hemisphere.

• On the first Sunday of September, the regata storica parade is staged in Venice, as prelude to the rowing contests known as regattas.

• Labor Day (Labour Day in Canada) is observed on the first Monday in September in the United States and Canada.

• 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.

• In Brazil, Independence Day is celebrated September 7

• 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 Alaska, Statehood Hero Day is celebrated on September 9. It is the birthdate of small town hero and legend, Quinn Bennett

• In the United States, September 11 is Patriot Day, in remembrance of the terrorist attacks on September 11, 2001.

• In the United States, Hispanic Heritage Month is celebrated from September 15 to October 15.

• In Mexico, Independence Day is celebrated September 16.

• In Saint Kitts and Nevis, National Heroes' Day is celebrated September 16.National Heroes Day (Saint Kitts and Nevis)

• In Saint Kitts and Nevis, Independence Day is celebrated September 19.[https://www.cia.gov/library/publications/the-world-factbook/geos/sc.html CIA - The World Factbook - Saint Kitts and Nevis]

• In Chile, Independence Day is celebrated September 18

• In China, Shenyang Incident ～ 18-9-1931 Japanese invaded China September 18

• September 19 is International Talk Like a Pirate Day.

• National Grandparents' Day takes place on the first Sunday after Labor Day in the United States and Canada http://www.canada.gc.ca/whats/nel_ng_e.html#9.

• In the Netherlands the third Tuesday in September is known as prinsjesdag. The government presents its annual budget. The queen rides to the parliament in a gilded coach and reads the plans for the coming year to the States-general.

• 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 autumn equinox is that of Mabon.

• Heritage Day is celebrated in South Africa on 24 September.

• In KwaZulu-Natal, king Shaka is commemorated on the last Sunday of September.

• Counterintuitively, the German Oktoberfest and the Chinese August Moon festival (more correctly called the Mid-Autumn Festival) both occur in September.

• German American Heritage Month begins on September 15 in the United States.

• In New Zealand , Father's Day is celebrated on the first Sunday of September.

• In Australia, Father's Day 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.

• 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.

• California Admission Day to commemorate the admission of California into the Union is September 9.

Miscellanea

• 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 the 4th of September.

• 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.

Symbols

• September's birthstone is the sapphire. The meaning is clear thinking.

• The birthflowers for September are the forget-me-not, and aster.