Articles About Equinox (19)
![March equinox illustration March equinox illustration](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/march-equinox-dark.png?1)
March Equinox
March equinox marks the beginning of spring in the Northern Hemisphere. It is the Southern Hemisphere's autumnal/fall equinox.
![September equinox illustration illustration of Earth's position in relation to the Sun's rays at the September equinox](http://webcf.waybackmachine.org/web/20210812174446im_/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.
![A crocus in the spring Sun.](http://webcf.waybackmachine.org/web/20210812174446im_/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.
![Low angle view of fall forest.](http://webcf.waybackmachine.org/web/20210812174446im_/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.
![The Full Moon behind three horses.](http://webcf.waybackmachine.org/web/20210812174446im_/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/20210812174446im_/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.
![Tourists visiting the Papal Basilica of St. Peter in the Vatican City Rome, Italy - November 2015. Tourists visiting the Papal Basilica of St. Peter in the Vatican City Rome, Italy - November 14, 2015](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/italy-rome-vatican-.jpg?1)
The Gregorian Calendar
The Gregorian calendar is the internationally accepted civil calendar that was first adopted in 1582.
![A tree changing through the four seasons. A tree changing through the four seasons.](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/four-seasons-causes.jpg?1)
What Causes Seasons on Earth?
Seasons change because Earth's rotational axis tilts away or towards the Sun during the course of a year.
![Bronze statue of Bolognese Pope Gregory XIII in Accursio Palace Bologna](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/pope-gregory.jpg?1)
Gregorian Calendar Reform: Why Are Some Dates Missing?
The Gregorian calendar was first introduced in 1582, however, different countries changed from the Julian Calendar at different times. Why were some days skipped?
![Sun Distances; Perihelion, Aphelion Diagram showing the distance between the Sun and Earth at different times of the year.](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/sun-distances.png?1)
Earth's Perihelion
Earth's closest approach to the Sun is two weeks after the December solstice is a coincidence and has no special significance.
![Sun setting in the background with cloudy sky and trees in the foreground.](http://webcf.waybackmachine.org/web/20210812174446im_/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.
![Astronomy Glossary - Terms & definitions Astronomy Glossary - Terms & definitions](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/fbimage-glossary--astronomy.png?1)
Astronomical Glossary - Terms & Definitions
What do astronomers really mean when they use those technical terms?
![Illustration showing Earth's axis drawn as a red line.](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/axial-tilt.png?1)
Earth Is Tilted
When an object the size of Mars crashed into the newly formed planet Earth around 4.5 billion years ago, it knocked it over and left it tilted at an angle.
![A pathway in a park during fall (autumn). A pathway in a park during fall (autumn).](http://webcf.waybackmachine.org/web/20210812174446im_/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.
![A spring robin pulling out a worm.](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/worm-moon.jpg?1)
March: Worm Moon
The Full Moon in March is the Worm Moon. It is also called Lenten Moon, Crow Moon, Crust Moon, Chaste Moon, Sugar Moon, and Sap Moon.
![Snowdrops growing up trough the snow.](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/snowdrops-snow-spring.jpg?1)
March Equinox Facts
On Sat, March 20, 2022, day and night will be of almost equal duration in most time zones in the world.
![Illustration image](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/stonehenge-june-solstice.jpg?1)
June Solstice Traditions
In many Northern Hemisphere cultures, the June solstice is associated with holidays, feasts and celebrations.
![Blue grapes on the vine at sunset.](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/ripe-grapes-harvest.jpg?1)
September Equinox Customs
Folklore, customs, traditions and holidays surrounding the September equinox.
![Easter Monday](http://webcf.waybackmachine.org/web/20210812174446im_/https://c.tadst.com/gfx/150x84/easter-monday.jpg?1)
March Equinox Customs
Learn more about the customs, traditions and events surrounding the March equinox.