Skip to content

History of Fall: What is the Autumnal Equinox?

EquinoxHISTORY OF THE FALL: What is the Autumnal Equinox?

This time of year represented New Year’s Day, according to the French Republican Calendar. However, since that calendar was only in use from 1793 to 1805, following the fall of the French monarchy in 1792, very few still celebrate this day.


Instead, September 22 or 23 marks the beginning of Fall or Autumn associated with the Equinox. This word is made up of two Latin root words aequus and nox meaning “equal night” referring to the fact that daylight and night time are equal in duration.


When the plane of the earth’s equator passes through the center of the Sun, metaphorically speaking, you have evennight, twice a year. This year, the astronomical autumnal equinox (Fall) occurs on September 23 at 07:50 UTC. This means Temps Universel Coordonne, or Coordinated Universal Time if you don’t speak French, roughly equivalent to Greenwich Mean Time if you’re British, Zulu Time if you’re a pilot. The Vernal Equinox occurs six months later. Since each equinox occurs at the same time whether in the northern hemisphere or the southern hemisphere, though the seasons are reversed, it is becoming common to call the (northern) vernal equinox the March Equinox and the Autumnal Equinox the September Equinox, thereby avoiding that annoying Northern Hemisphere bias.



It used to be that September was the time of the return of students to school, following harvest time. Indeed, during Charlemagne’s calendar September was called “harvest month,” the Anglo-Saxons called it Gerstmonath or barley month referring to its harvest, and the Swiss call it Herbstmonat or “harvest month.”

Meteorologically, Fall begins September 1. But over the years due to a confluence of influences including in part truancy, sunspot activity, cosmic ray interference, and standardized testing, many students now return to classrooms in August — completely ruining the song “See You In September” — currently the end of Summer is observed following the Labor Day holiday.

Bill Petro, your friendly neighborhood historian

If you enjoyed this article, please consider leaving a comment, or subscribing to the news feed to have future articles delivered to your feed reader, or to your email.

About billpetro

Bill Petro is a technology sales enablement executive with extensive experience in Cloud Computing, Automation, Data Center, Information Storage, Big Data/Analytics, Mobile, and Social technologies.

Leave a Reply

Scroll To Top
%d bloggers like this: