About one in twenty persons is born under the sign of this mystical constellation, but few of them know it. The constellation is called Ophiuchus, which means "he who holds the serpent". The Sun is in it from November 30 to December 17 and so if you are born between those dates you are not actually a Sagittarius but rather Ophiuchus. However, Ophiuchus is not part of the Western astrological zodiac, because the Sun doesn't spend the same amount of time, as it does in the other 12 constellations.