Virgo is the Maiden, holding an ear of wheat marked by Spica, the brightest star in the constellation. It is the largest constellation on the Sun’s path and the second largest in the sky, which is why the Sun spends longer here than anywhere else: about six and a half weeks from mid-September. The September equinox now happens inside Virgo. The horoscope’s Virgo is nearly over before the Sun arrives, having been placed by an equinox that has since moved on.
The dates above are computed for 2026 from the constellation boundaries the International Astronomical Union fixed in 1930. They move by about a day every seventy years, so they are good for a lifetime, and for the particular day you were born the calculator will check the boundary itself.