Astronomers have recalculated the original Babylonian zodiac by accounting for shifts in the Earth's axis over the millennia. I've been bumped up from a Pisces to an Aquarius! Capricorn: Jan. 20-Feb. 16. Aquarius: Feb. 16-March 11. Pisces: March 11-April 18. Aries: April 18-May 13. Taurus: May 13-June 21. Gemini: June 21-July 20. Cancer: July 20-Aug. 10. Leo: Aug.