A farmer in Iron Age Britain watched the sunrise on the equinox and knew exactly where to plant the next season’s grain. The same sun rose over a stone circle in Ireland, and a priest knew exactly when to light the ritual fire. The autumn equinox and spring equinox are not opposites. They are the same astronomical event observed from opposite sides of the sun’s journey. The autumn equinox (Mabon) and spring equinox (Ostara) mark the two moments each year when day and night are equal, but one opens the door to darkness and the other to light.
What the Equinox Actually Is
The word comes from Latin aequus (equal) and nox (night). Twice a year, around March 20 and September 22, the sun crosses the celestial equator. The Earth’s axis tilts neither toward nor away from the sun. Day and night are nearly equal everywhere on the planet. Not exactly equal: refraction bends sunlight at the horizon, making the day a few minutes longer than the night. But close enough that every culture that watched the sky noticed.
The spring equinox (vernal equinox, Ostara) occurs when the sun moves north across the equator. The autumn equinox (autumnal equinox, Mabon) occurs when it moves south. One is the beginning of the light half of the year. The other begins the dark half. They are the same mechanism. They produce opposite results.
Where the Names Come From
The spring equinox has no ancient pagan name that survives in primary sources. “Ostara” comes from Jacob Grimm, who in his 1835 Deutsche Mythologie reconstructed a hypothetical Germanic goddess Ostara from the Old English Ēostre. The Venerable Bede, writing in 725 CE in De Temporum Ratione, mentions that the Anglo-Saxon month Ēosturmōnaþ was named after a goddess Eostre, whose feasts were celebrated in that month. No pre-Christian text confirms her. Grimm built the rest from linguistic reconstruction. Modern pagans adopted the name in the 1950s and 1960s through the writings of Gerald Gardner and Robert Graves.
The autumn equinox has an even more recent name. “Mabon” was coined by Aidan Kelly in the 1970s for the Wiccan calendar. He took it from the Welsh myth of Mabon ap Modron, a divine child taken from his mother at three nights old and later rescued. The name has no historical connection to an equinox festival. The actual Celtic harvest festival was Lughnasadh (August 1), and the Germanic harvest festival was Hærfest (simply “harvest”). The equinox itself was observed but not named in most pre-Christian traditions.
That does not make the names invalid. Traditions evolve. But a practitioner should know that “Mabon” is a 1970s invention and “Ostara” is a 19th-century reconstruction. The festivals are real. The names are modern.
What Each Festival Actually Marks
The spring equinox is a festival of return. The sun crosses the equator moving north. Days become longer than nights. The soil warms. Seeds germinate. In agricultural societies, this was the moment you planted. The Roman calendar placed the new year here. The Persian Nowruz, still celebrated today, begins at the spring equinox. The Jewish Passover falls on the first full moon after the equinox. Easter is calculated the same way: the first Sunday after the first full moon after the spring equinox.
The autumn equinox is a festival of balance before descent. The sun crosses the equator moving south. Nights become longer than days. The harvest is gathered. What was planted in spring is now stored. This was the moment you counted what you had and prepared for winter. The Greek festival of the Thesmophoria, honoring Demeter and Persephone, was held around the autumn equinox. Women built shelters of leaves, fasted, and offered piglets to the earth. The descent of Persephone into the underworld began here.
How You Spoke to Each
Spring equinox practices center on clearing, planting, and welcoming. In ancient Rome, the festival of Hilaria on March 25 celebrated the resurrection of Attis. Participants wore masks, held processions, and exchanged jokes. The tone was loud, public, and joyful. In medieval Europe, the spring equinox was associated with the return of the sun’s warmth. People swept their houses clean, opened windows, and burned last year’s debris. The fire was not symbolic. It was practical: ash went into the garden soil.
Autumn equinox practices center on gratitude, accounting, and closing. The Anglo-Saxon Hærfest involved the last sheaf of grain, which was woven into a corn dolly and kept through winter. In Scotland, the Cailleach (the hag) was said to take her first step on the autumn equinox, claiming the land for winter. People made offerings of the last bread, poured ale onto the earth, and thanked the land for what it gave. The tone was solemn, not sad. You do not mourn a full granary.
In modern occult practice, the spring equinox is a time for initiation and new work. The Golden Dawn admitted new members at the spring equinox. The equinox was their new year. The autumn equinox is a time for review, release, and preparation for the inner work of winter. Many traditions use it to examine what has been harvested in their own lives: what succeeded, what failed, what must be set aside.
What the Symbols Actually Mean
Spring equinox symbols: eggs, hares, seeds, green shoots, the color of new leaves. The egg is not a generic fertility symbol. It is a container of potential. The shell breaks. Something emerges. The hare is not a generic animal. It was sacred to the goddess Eostre in Bede’s account. Hares were observed to behave strangely in March: boxing, leaping, chasing. People read that as the goddess’s energy manifesting in the visible world.
Autumn equinox symbols: apples, gourds, corn sheaves, fallen leaves, the color of drying grass. The apple is the key symbol. Cut an apple crosswise and you see the five-pointed star at its core. That star was read as the hidden order within apparent decay. The apple was also the fruit of the Otherworld in Celtic myth. To eat it was to enter the land of the dead. The autumn equinox is the moment when the door between worlds grows thin, not as thin as Samhain, but thin enough to feel.
What the Fire Actually Did
Spring equinox fire traditions are about kindling. In the Baltic region, people lit bonfires on hilltops at the spring equinox. They danced around them, jumped over them, and drove cattle between two fires to purify them for the grazing season. The fire was a boundary. It marked the transition from the confined winter to the open summer. The smoke carried prayers upward. The warmth was a promise.
Autumn equinox fire traditions are about preservation. In the Scottish Highlands, the teine éigin (need-fire) was sometimes lit at the autumn equinox if the community faced a crisis. The fire was made by friction, using oak and fir. All other fires in the village were extinguished first. The new fire was used to relight every hearth. The fire was not a celebration. It was a reset. The old year’s flame died. The new flame began.
Common Misconceptions
The most common error is treating the equinoxes as opposites. They are not. They are the same event seen from opposite sides of the orbit. The spring equinox in the northern hemisphere is the autumn equinox in the southern hemisphere. If you move to Australia, your Mabon is in March and your Ostara is in September. The festivals are tied to the sun’s position, not to the calendar date.
Another error: assuming the equinoxes were the most important festivals in pre-Christian Europe. They were not. The solstices and the cross-quarter days (Samhain, Imbolc, Beltane, Lughnasadh) were more significant in most Celtic and Germanic traditions. The equinoxes were observed but often subsumed into larger seasonal cycles. The spring equinox was the beginning of the planting season, but the actual festival of growth was Beltane. The autumn equinox was the midpoint of the harvest, but the actual festival of the dead was Samhain.
A third error: treating the equinoxes as purely solar festivals. They are solar, but they are also agricultural. The spring equinox has meaning because seeds need to go into the ground at that moment. The autumn equinox has meaning because grain needs to be stored before the rains come. The astronomical event and the practical need are the same thing. Separate them and you lose the point.
FAQ
Why is the spring equinox called Ostara and the autumn equinox called Mabon? Both names are modern. Ostara was reconstructed by Jacob Grimm from Bede’s mention of a goddess Eostre. Mabon was coined by Aidan Kelly in the 1970s from Welsh mythology. Neither name appears in pre-Christian equinox festivals.
Do the equinoxes have the same meaning in the southern hemisphere? No. The seasons are reversed. The September equinox is spring in the southern hemisphere and autumn in the northern hemisphere. The March equinox is autumn in the southern hemisphere and spring in the northern hemisphere.
Which equinox is more important in occult practice? It depends on the tradition. The spring equinox is often used for new beginnings and initiations. The autumn equinox is used for harvest, review, and preparation for the dark half of the year. Neither is inherently more powerful.
Can you celebrate both equinoxes if you follow one tradition? Yes. Many practitioners observe both. The spring equinox opens the light half of the year. The autumn equinox opens the dark half. They are two doors on the same axis. You walk through both.
The Axis Holds
The spring equinox and autumn equinox are not rivals. They are the same hinge swinging in opposite directions. One opens to growth. One opens to storage. One opens to the sun’s return. One opens to the sun’s departure. Both are necessary. A year without an autumn equinox would be a year that never harvested. A year without a spring equinox would be a year that never planted.
The axis of the Earth does not care which side you stand on. It tilts. The sun crosses. The day and night balance. Then the balance tips again. That is the equinox: a moment of perfect equilibrium that lasts only as long as it takes to notice.
For more on the wheel of the year, see our guide to seasonal festivals and solstice traditions. The symbols of the equinoxes connect to broader seasonal symbols in occult practice. And for the festival that follows the autumn equinox, read our guide to Samhain: the threshold of the dark half.