Articles About September (13)
![Illustration image](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/12month-calendar.png?1)
The 12 Months of the Year
The 12 months of the year are linked to the Moon's orbit around Earth. Why are there 12 months? What do the month names mean?
![Illustration image](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/four-seasons.jpg?1)
Defining Seasons
When do seasons begin and end in the two hemispheres?
![The Full Moon behind three horses.](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/farmers-almanac-horses.jpg?1)
Full Moon Names
Full Moons had given names in many ancient cultures. The Full Moon names we use today often reflect nature like Harvest Moon.
![Calendar of Cosmic Events, Watch the Sky! Calendar of Cosmic Events](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/fb--cosmic-events-01.png?1)
2021 Cosmic Calendar
Celestial events and highlights of 2021 and 2022 including supermoons, solar and lunar eclipses, meteor showers, solstices, and equinoxes.
![September equinox illustration illustration of Earth's position in relation to the Sun's rays at the September equinox](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/september-equinox-dark.png?1)
September Equinox
The Sun shines directly on the Equator on the September equinox and the length of day and night is nearly equal, but not quite.
![Harvest Supermoon rises over the campus of West Virginia University in Morgantown WV on November 13, 2016.](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/harvest-moon-supermoon.jpg?1)
Harvest Moon in September or October?
The Harvest Moon varies between September or October in the Northern Hemisphere. It is the Full Moon nearest the autumnal (fall) equinox.
![Low angle view of fall forest.](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/autumn-leaves-equinox.jpg?1)
When Is Fall Equinox?
The fall (autumnal) equinox in the Northern Hemisphere is in September. In the Southern Hemisphere, it's in March.
![A crocus in the spring Sun.](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/crocus-spring-equinox.jpg?1)
When Is Spring Equinox?
The Vernal (Spring) Equinox in the Northern Hemisphere is in March. In the Southern Hemisphere, it's in September.
![Sun setting in the background with cloudy sky and trees in the foreground.](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/sunset-in-valley.jpg?1)
Equinox: Equal Day & Night?
Equinoxes don't have exactly 12 hours of day and night all over the world, like many believe. Such days, called equilux, do occur, but depend on your location.
![A pathway in a park during fall (autumn). A pathway in a park during fall (autumn).](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/september-equinox-facts.jpg?1)
10 September Equinox Facts
10 things you may not know about the September Equinox.
![Month of September Month of September](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/the-month-september.jpg?1)
The Month of September
September is the ninth month of the year in and has 30 days. It was originally the seventh month of the Roman calendar until 153 BCE.
![A Full Moon shines over a field of corn ready to be harvested. Dark blue night sky in the background.](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/full-moon-in-corn-field.jpg?1)
September: Harvest or Corn Moon
The September Full Moon is usually the Harvest Moon, but this depends on the equinox. It is also called Full Corn Moon or Barley Moon.
![Blue grapes on the vine at sunset.](http://webcf.waybackmachine.org/web/20210813022206im_/https://c.tadst.com/gfx/150x84/ripe-grapes-harvest.jpg?1)
September Equinox Customs
Folklore, customs, traditions and holidays surrounding the September equinox.