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This article is about the month. For other uses, see September (disambiguation).
"Sep." redirects here. For other uses, see SEP.
"Sept." redirects here. For the family word, see Sept.

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September (/ˌsɛptˈɛmbər/ ⓘ sep-TEM-bər) is the ninth month of the year in the Julian and Gregorian Calendars and one of four months with a length of 30 days.

September in the Northern Hemisphere 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 (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.

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.

The autumnal equinox in the northern hemisphere and the vernal or spring equinox in the southern hemisphere occur 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 is celebrated on the first Sunday of September.[3]

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.

September in the calendar

September begins on the same day of the week as December every year, because there are 91 days in September, October and November, 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.

Month-long observances

  • Amerindian Heritage Month (Guyana)
  • Childhood Cancer Awareness Month
  • Gynecologic Cancer Awareness Month
  • Leukemia and Lymphoma Awareness Month
  • Thyroid Cancer Awareness Month

United States observances

Other observances

Non-Gregorian observances, 2015 dates

Movable Gregorian Observances, 2015 dates

First Friday: September 4

Saturday before First Monday: September 5

First Sunday: September 6

First Sunday after September 4: September 6

Week of September 10: September 6-12

First Monday: September 7

Thursday after the first Sunday: September 10

Nearest weekday to September 12: September 11

Weekend after first Monday: September 12-13

Second Saturday: September 12

Saturday after first Monday: September 12

Second Sunday: September 13

Sunday after first Monday: September 13

Second Sunday: September 13

Weekday nearest September 17

Weekend of the Week of September 17

Third Friday: September 18

Saturday closest Sept. 23: September 19

Third Weekend: September 19-20

Saturday of the Third Weekend: September 19

Sunday of the Third Weekend: September 20

Week of September 22: September 20-26

Sunday before September 23 to Saturday:September 20-26

Third Monday: September 21

Third Tuesday: September 22

Fourth Friday: September 25

Last Friday: September 25

Fourth Sunday: September 27

Last Sunday: September 27

Fixed Gregorian observances

September, from the Très Riches Heures du Duc de Berry
School starts in September in many countries, such as here, in Liège
WPA poster, 1940
Sapphire, September birthstone
Forget-me-not, September birth flower

Miscellanea

The Dutch Finance Minister carrying the 'third Tuesday in September' suitcase, 1983.

September symbols

References

  1. ^ Metoffice.gov.uk[dead link‍]
  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. ^ "Fathers Day in Australia".
  4. ^ a b c d e f g h i j k "Food Days, Weeks, Months - September". UNL Food. University of Nebraska–Lincoln.
  5. ^ Goldstein, Darra (2011). "National Turkey Day". Gastronomica. 11 (4).
  6. ^ "Ancestry.com". Ancestry.com. Retrieved 2013-08-22.
  7. ^ http://www.allnepal.com/nepal/festivals.php
  8. ^ http://www.bhutangreentravel.com/PublicHolidays.php
  9. ^ http://hindusphere.com/radhashtami-2015-date/
  10. ^ http://www.drikpanchang.com/vrats/ashtami/maha-lakshmi/sixteen-days-mahalakshmi-vrat.html
  11. ^ http://www.bhutangreentravel.com/PublicHolidays.php
  12. ^ http://www.bhutangreentravel.com/PublicHolidays.php
  13. ^ a b c d e Chisholm, Hugh, ed. (1911). "September" . Encyclopædia Britannica (11th ed.). Cambridge University Press.
  14. ^ SHG Resources. "SHGresources.com". SHGresources.com. Retrieved 2013-08-22.
  15. ^ "Flowerstower.com". Archived from the original on February 24, 2013. Retrieved 2013-08-22. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  • The dictionary definition of September at Wiktionary
  • Media related to September at Wikimedia Commons
  • Quotations related to September at Wikiquote
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