Articles About Equinox (17)
At the March equinox, the Sun crosses the equator from south to north. Explanation and 2024 equinox date.
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 Does Spring Start?
The first day of spring is at the vernal equinox, when day and night are equal. Find out the exact time and date.
When Does Fall Start?
North of the equator, fall begins in September. Find out the exact dates for both hemispheres.
Equinoxes and Solstices
Equinoxes and solstices are a result of Earth’s tilt and its orbit around the Sun.
Cosmic Calendar 2024
Celestial highlights for 2024. When, where, and how to see these astronomical events.
What Causes Seasons on Earth?
Seasons change because Earth's rotational axis tilts away or towards the Sun during the course of a year.
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 Facts about the September Equinox
10 things you may not know about the September equinox.
March: Worm Moon
The Full Moon in March is the Worm Moon, but if it occurs on or after March 21 it is also the Paschal Moon. It's also called Lenten, Crow, Crust, Chaste, Sugar, and Sap Moon.
10 Facts about the March Equinox
On March 20, 2024, day and night are 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.