Articles About Equinox (19)
March equinox marks the beginning of spring in the Northern Hemisphere. It is the Southern Hemisphere's autumnal/fall 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.
When Is Spring Equinox?
The Vernal (Spring) Equinox in the Northern Hemisphere is in March. In the Southern Hemisphere, it's in September.
When Is Fall Equinox?
The fall (autumnal) equinox in the Northern Hemisphere is in September. In the Southern Hemisphere, it's in March.
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.
The Gregorian Calendar
The Gregorian calendar is the internationally accepted civil calendar that was first adopted in 1582.
What Causes Seasons on Earth?
Seasons change because Earth's rotational axis tilts away or towards the Sun during the course of a year.
Change From Julian to Gregorian Calendar
The Gregorian calendar was first introduced in 1582, however, different countries changed from the Julian Calendar at different times.
Earth's closest approach to the Sun is two weeks after the December solstice is a coincidence and has no special significance.
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.
Astronomical Glossary - Terms & Definitions
What do astronomers really mean when they use those technical terms?
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.
10 September Equinox Facts
10 things you may not know about the September Equinox.
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.
March Equinox Facts
On Sat, March 20, 2021, day and night will be of almost equal duration in most time zones in the world.
June Solstice Traditions
In many Northern Hemisphere cultures, the June solstice is associated with holidays, feasts and celebrations.
September Equinox Customs
Folklore, customs, traditions and holidays surrounding the September equinox.
March Equinox Customs
Learn more about the customs, traditions and events surrounding the March equinox.