Articles About September (14)
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?
Defining Seasons
When do seasons begin and end in the two hemispheres?
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.
2021 Cosmic Calendar
Celestial events and highlights of 2021 and 2022 including supermoons, solar and lunar eclipses, meteor showers, solstices, and equinoxes.
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 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.
When Does Fall Start?
North of the equator, fall begins in September; in the Southern Hemisphere, it starts in March. Find out exact dates and how the fall season is defined.
When Is Spring Equinox?
The Vernal (Spring) Equinox in the Northern Hemisphere is in March. In the Southern Hemisphere, it's in September.
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.
10 Sept Equinox Facts
10 things you may not know about the September Equinox.
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.
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.
September Equinox Customs
Folklore, customs, traditions and holidays surrounding the September equinox.
Equinoxes and Solstices
Equinoxes and solstices are a result of Earth’s tilt and its orbit around the Sun.