From Latin solstitium meaning a turning point of the sun, used as a nature-centered name.
Solstice arrives from the Latin solstitium, a compound of sol (sun) and sistere (to stand still) — describing the twice-yearly astronomical moment when the sun reaches its greatest distance from the celestial equator and appears, briefly, to pause in its journey. The summer solstice is the longest day, the triumph of light; the winter solstice is the longest night, the pivot point after which light begins its slow return. Both moments have been celebrated across virtually every human culture: Stonehenge was aligned to the solstices, the Roman Saturnalia fell around the winter solstice, and the Norse celebrated Jul (Yule) at the same turning point.
As a given name, Solstice belongs to the growing "word name" and "celestial name" movements of the late twentieth and early twenty-first centuries, alongside Aurora, Orion, Soleil, and Equinox. It carries strong associations with Pagan and Wiccan traditions, where the solstices are sacred sabbats (Litha in summer, Yule in winter), and with a broader spiritual-naturalist sensibility that finds meaning in the rhythms of the earth rather than in institutional religion. It also has an obvious appeal for parents of children born near June 20-21 or December 21-22.
Solstice has a gravity and length — four syllables, SOL-stiss — that gives it genuine presence. It is a name that makes a quiet philosophical statement: that this child arrived at a turning point, at a moment of astronomical significance, at the hinge between darkness and light. Few names carry so complete a cosmological story within their syllables.