Where and how will you grow for the next three years? Disciplined Saturn in worldly Sagittarius pushes us to evolve our beliefs and open our minds, but from a practical point of view. On December 23, 2014, Saturn—the ruler of maturity, growth and challenges—leaves watery Scorpio for fiery Sagittarius, where it will stay until December 19, 2017. Saturn visits each zodiac sign every 28-30 years, so its arrival heralds a definitive two-to-three year period that reveals where our toughest lessons will be.