Scorpius is the Scorpion, with the red supergiant Antares at its heart and a long curved tail that dips well south of the ecliptic. The Sun clips only its northern claw and is through in under a week at the end of November. The horoscope’s Scorpio lasts a month and has all but ended by the time the Sun reaches the Scorpion at all. It is describing what the sky did two thousand years ago.
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.