Editing September (section)

{{short description|Ninth month in the Gregorian and Julian calendars}}
{{About|the month|}}
{{Redirect2|Sep.|Sept.|other uses of Sep.|SEP (disambiguation){{!}}SEP|the family division|Sept}}
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'''September''' is the ninth month of the year in the [[Julian calendar|Julian]] and [[Gregorian calendar]]s. Its length is 30 days.
[[File:Les Très Riches Heures du duc de Berry septembre.jpg|right|thumb|September, from the ''[[Très Riches Heures du Duc de Berry]]'']]

September in the [[Northern Hemisphere]] and [[March]] in the [[Southern Hemisphere]] are seasonally equivalent.

In the Northern hemisphere, the beginning of the meteorological [[autumn]] is on 1 September. In the Southern hemisphere, the beginning of the meteorological [[Spring (season)|spring]] is on 1 September.<ref>{{cite web|url=http://www.metoffice.gov.uk/climatechange/guide/effects/seasons.html|archive-url=http://webarchive.nationalarchives.gov.uk/20090225040732/http://www.metoffice.gov.uk/climatechange/guide/effects/seasons.html|url-status=dead|archive-date=2009-02-25|title=Met Office: Changing seasons|first=Met|last=Office|website=webarchive.nationalarchives.gov.uk}}</ref> 

September marks the beginning of the [[Eastern Orthodox liturgical calendar|ecclesiastical year]] in the [[Eastern Orthodox Church]]. It is the start of the [[academic term|academic year]] in many countries of the northern hemisphere, in which children go back to school after the [[Summer vacation|summer break]], sometimes on [[September 1|the first day of the month]]. Some [[Libra (astrology)|Libras]]
and [[Virgo (astrology)|Virgos]] are born in September, with Virgos being born on [[September 1st]] through [[September 22nd]] and Libras [[September 23rd]] through [[September 30]].

[[September (Roman month)|September]] (from Latin ''septem'', "seven") was originally the seventh month in the oldest known [[Roman calendar]], the [[Roman calendar#Legendary 10-month calendar|calendar of Romulus]] {{circa|750 BC}}, with March being (Latin ''[[Martius (month)|Martius]]'') the first month of the year until perhaps as late as 451 BC.<ref>[[H.H. Scullard]], ''Festivals and Ceremonies of the Roman Republic'' (Cornell University Press, 1981), p.&nbsp;84; Gary Forsythe, ''Time in Roman Religion: One Thousand Years of Religious History'' (Routledge, 2012), p.&nbsp;14.</ref> After the calendar reform that added [[Ianuarius|January]] and [[Februarius|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.