September

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September, from the Tres Riches Heures du Duc de Berry Les Tres Riches Heures du duc de Berry septembre.jpg
September, from the Très Riches Heures du Duc de Berry
School starts in September in many countries, such as Belgium Liege (3).JPG
School starts in September in many countries, such as Belgium
WPA poster, 1940 September WPA poster.jpg
WPA poster, 1940
Sapphire, September birthstone Logansapphire.jpg
Sapphire, September birthstone
Forget-me-not, September birth flower 2008-05-04 at 18-26-44-Forgetmenot-Flower.jpg
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.

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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 of the northern hemisphere, 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 in the oldest known Roman calendar, the calendar of Romulus c.750 BC, with March (Latin Martius ) the first month of the year until perhaps as late as 451 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 begins on the same day as December in both common and leap years. 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. In common years, September begins on the same day of the week as April and July and ends on the same day of the week as April and December of the previous year. In leap years, September starts on the same day of the week as January and October of the previous year and ends on the same day of the week as July of the previous year. In common years preceded by leap years, September begins on the same day of the week as January of the previous year. In years followed by common years, September begins and ends on the same day of the week as June and ends on the same day of the week as March of the following year. In years before leap years, September begins on the same day of the week as March and November and ends on the same day of the week as August and November of the following year.

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

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.

September symbols

Observances

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

Non-Gregorian observances: 2020 dates

Month-long observances

United States observances

Food Months

Movable Gregorian observances: 2020 dates

First Wednesday: September 2

First Thursday: September 3

First Friday: September 4

First Sunday: September 6

First Sunday after September 4: September 6

Week of the First Monday: September 6–12

Week of September 10: September 6–12

First Monday: September 7

Nearest weekday to September 12: September 11

Second Saturday: September 12

Saturday after first Monday: September 12–13

Second Sunday: September 13

First Sunday after first Monday: September 13

Week of September 17: September 13–19

Third Tuesday: September 15

September 17 but observed on previous Friday if it falls on a Saturday or following Monday if on a Sunday: September 17

Third Friday: September 18

Third Saturday: September 19

Weekend of the week of September 17: September 19–20

Third Sunday: September 20

Week of Sunday before September 23: September 20–26

Week of September 22: September 20–26

Last week: September 20–26

Last full week: September 20–26

Third Monday: September 21

Observances pertaining to the September Equinox: September 22

Fourth Friday: September 25

Last Friday: September 25

Last Saturday: September 26

Last Sunday: September 27

Fourth Monday: September 28

Last Wednesday: September 30

Last weekday in September: September 30

Fixed Gregorian observances

Related Research Articles

April Fourth month in the Julian and Gregorian calendars

April is the fourth month of the year in the Gregorian calendar, the fifth in the early Julian, the first of four months to have a length of 30 days, and the second of five months to have a length of less than 31 days.

August Eighth month in the Julian and Gregorian calendars

August is the eighth month of the year in the Julian and Gregorian calendars, and the fifth of seven months to have a length of 31 days. It was originally named Sextilis in Latin because it was the sixth month in the original ten-month Roman calendar under Romulus in 753 BC, with March being the first month of the year. About 700 BC, it became the eighth month when January and February were added to the year before March by King Numa Pompilius, who also gave it 29 days. Julius Caesar added two days when he created the Julian calendar in 46 BC, giving it its modern length of 31 days. In 8 BC, it was renamed in honor of Augustus. According to a Senatus consultum quoted by Macrobius, he chose this month because it was the time of several of his great triumphs, including the conquest of Egypt.

December Twelfth month in the Julian and Gregorian calendars

December is the twelfth and final month of the year in the Julian and Gregorian Calendars. It is also the last of seven months to have a length of 31 days.

February is the second month of the year in the Julian and Gregorian calendars. The month has 28 days in common years or 29 in leap years, with the 29th day being called the leap day. It is the first of five months to have fewer than 31 days and the only one to have fewer than 30 days. The other seven months have 31 days.

January is the first month of the year in the Julian and Gregorian calendars and the first of seven months to have a length of 31 days. The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the Northern Hemisphere and the warmest month of the year within most of the Southern Hemisphere. In the Southern hemisphere, January is the seasonal equivalent of July in the Northern hemisphere and vice versa.

June is the sixth month of the year in the Julian and Gregorian calendars, the second of four months to have a length of 30 days, and the third of five months to have a length of less than 31 days. June contains the summer solstice in the Northern Hemisphere, the day with the most daylight hours, and the winter solstice in the Southern Hemisphere, the day with the fewest daylight hours. June in the Northern Hemisphere is the seasonal equivalent to December in the Southern Hemisphere and vice versa. In the Northern Hemisphere, the beginning of the traditional astronomical summer is 21 June. In the Southern Hemisphere, meteorological winter begins on 1 June.

July Seventh month in the Julian and Gregorian calendars

July is the seventh month of the year in the Julian and Gregorian Calendars and the fourth of seven months to have a length of 31 days. It was named by the Roman Senate in honour of Roman general Julius Caesar, it being the month of his birth. Prior to that, it was called Quintilis, being the fifth month of the 10-month calendar.

A leap year is a calendar year that contains an additional day added to keep the calendar year synchronized with the astronomical year or seasonal year. Because astronomical events and seasons do not repeat in a whole number of days, calendars that have the same number of days in each year drift over time with respect to the event that the year is supposed to track. By inserting an additional day or month into the year, the drift can be corrected. A year that is not a leap year is a common year.

March is the third month of the year and named after Mars in both the Julian and Gregorian calendars. It is the second of seven months to have a length of 31 days. In the Northern Hemisphere, the meteorological beginning of spring occurs on the first day of March. The March equinox on the 20 or 21 marks the astronomical beginning of spring in the Northern Hemisphere and the beginning of autumn in the Southern Hemisphere, where September is the seasonal equivalent of the Northern Hemisphere's March.

May Fifth month in the Julian and Gregorian calendars

May is the fifth month of the year in the Julian and Gregorian calendars and the third of seven months to have a length of 31 days.

November is the eleventh and penultimate month of the year in the Julian and Gregorian Calendars, the fourth and last of four months to have a length of 30 days and the fifth and last of five months to have a length of fewer than 31 days. November was the ninth month of the calendar of Romulus c. 750 BC. November retained its name when January and February were added to the Roman calendar. November is a month of late spring in the Southern Hemisphere and late autumn in the Northern Hemisphere. Therefore, November in the Southern Hemisphere is the seasonal equivalent of May in the Northern Hemisphere and vice versa. In Ancient Rome, Ludi Plebeii was held from November 4–17, Epulum Jovis was held on November 13 and Brumalia celebrations began on November 24. These dates do not correspond to the modern Gregorian calendar.

New Year First day of a calendar year, in particular, January 1 in the Julian and Gregorian calendar

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

October Tenth month in the Julian and Gregorian calendars

October is the tenth month of the year in the Julian and Gregorian Calendars and the sixth of seven months to have a length of 31 days. The eighth month in the old calendar of Romulus c. 750 BC, October retained its name after January and February were inserted into the calendar that had originally been created by the Romans. In Ancient Rome, one of three Mundus patet would take place on October 5, Meditrinalia October 11, Augustalia on October 12, October Horse on October 15, and Armilustrium on October 19. These dates do not correspond to the modern Gregorian calendar. Among the Anglo-Saxons, it was known as Ƿinterfylleþ, because at this full moon (fylleþ) winter was supposed to begin.

The Revised Julian calendar, also known as the Milanković calendar, or, less formally, new calendar, is a calendar proposed by the Serbian scientist Milutin Milanković in 1923, which effectively discontinued the 340 years of divergence between the naming of dates sanctioned by those Eastern Orthodox churches adopting it and the Gregorian calendar that has come to predominate worldwide. This calendar was intended to replace the ecclesiastical calendar based on the Julian calendar hitherto in use by all of the Eastern Orthodox Church. From 1 March 1600 through 28 February 2800, the Revised Julian calendar aligns its dates with the Gregorian calendar, which was proclaimed in 1582 by Pope Gregory XIII for adoption by the Christian world. The calendar has been adopted by the Orthodox churches of Constantinople, Albania, Alexandria, Antioch, Bulgaria, Cyprus, Greece, and Romania.

A solstice is an event occurring when the Sun appears to reach its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Two solstices occur annually, around June 21 and December 21. In many countries, the seasons of the year are determined by reference to the solstices and the equinoxes.

Coptic calendar Egyptian liturgical calendar

The Coptic calendar, also called the Alexandrian calendar, is a liturgical calendar used by the Coptic Orthodox Church and also used by the farming populace in Egypt. This calendar is based on the ancient Egyptian calendar. To avoid the calendar creep of the latter, a reform of the ancient Egyptian calendar was introduced at the time of Ptolemy III which consisted of the intercalation of a sixth epagomenal day every fourth year. However, this reform was opposed by the Egyptian priests, and the reform was not adopted until 25 BC, when the Roman Emperor Augustus imposed the Decree upon Egypt as its official calendar. To distinguish it from the Ancient Egyptian calendar, which remained in use by some astronomers until medieval times, this reformed calendar is known as the Coptic or Alexandrian calendar. Its years and months coincide with those of the Ethiopian calendar but have different numbers and names.

September equinox Astronomical event of the Solar System

The September equinox is the moment when the Sun appears to cross the celestial equator, heading southward. Due to differences between the calendar year and the tropical year, the September equinox can occur at any time between September 21 and 24.

March equinox The equinox on the Earth when the Sun appears to leave the southern hemisphere and cross the celestial equator

The March equinox or Northward equinox is the equinox on the Earth when the subsolar point appears to leave the Southern Hemisphere and cross the celestial equator, heading northward as seen from Earth. The March equinox is known as the vernal equinox in the Northern Hemisphere and as the autumnal equinox in the Southern.

Lists of holidays by various categorizations.

A perennial calendar is a calendar that applies to any year, keeping the same dates, weekdays and other features.

References

  1. Office, Met. "Met Office: Changing seasons". webarchive.nationalarchives.gov.uk. Archived from the original on 2009-02-25.
  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. 1 2 3 4 Chisholm, Hugh, ed. (1911). "September"  . Encyclopædia Britannica (11th ed.). Cambridge University Press.
  4. SHG Resources. "SHGresources.com". SHGresources.com. Retrieved 2013-08-22.
  5. "Flowerstower.com". Archived from the original on February 24, 2013. Retrieved 2013-08-22.
  6. 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.
  7. "Astrology Calendar", yourzodiacsign. Signs in UT/GMT for 1950–2030.
  8. 1 2 "Cancer Awareness Month :: Society of Gynecologic Nurse Oncologists". www.sgno.org.
  9. http://www.cinj.org/sites/cinj/files/documents/Sept15LeukemiaLymphoma.pdf
  10. Baunfire.com, Spark CMS by. "September Is Thyroid Cancer Awareness Month – ThyCa: Thyroid Cancer Survivors' Association, Inc". www.thyca.org.
  11. "Promote National Suicide Prevention Month". suicidepreventionlifeline.org. Retrieved 2019-11-25.
  12. 1 2 3 4 5 6 7 8 9 10 "Food Days, Weeks, Months – September". UNL Food. University of Nebraska–Lincoln.
  13. Goldstein, Darra (2011). "National Turkey Day". Gastronomica . 11 (4).
  14. "September is Hydrocephalus Awareness Month! Here's What You Can Do…". Hydrocephalus Association. Retrieved 29 July 2016.
  15. "California Wine Month – California Wines". www.discovercaliforniawines.com.
  16. "September Monthly Observations". 4 January 2016.
  17. https://www.tewikiotereomaori.co.nz/