New Zodiac Sign?

What's this I hear of a new Zodiac sign?  Ophiuchus?  Come on.  I was just getting comfortable with being a Gemini.  Not sure what all this Zodiac mumbo-jumbo entails, but we now have 13 signs - and 12 months.  The math doesn't add up.  I was and forever will be a Gemini.

Oh wait, I just got a tweet from @GeminiFDH - Hey #Gemini your zodiac sign has not changed. You are still a proud #Gemini! Ophiuchus isn't the 13th sign. It's a constellation. 

Crisis averted. Whew! Therefore this chart below is crap.

NEW ZODIAC SIGN CHART

Capricorn
January 20- to February 16
Aquarius
February 16 to March 11
Pisces
March 11 to April 18.
Aries
April 18 to May 13
Taurus
May 13 to June 21.
Gemini
June 21 to July 20
Cancer
July 20 to August 10
Leo
August 10 to September 16
Virgo
September 16 to October 30
Libra
October 30 to November 23
Scorpio
November 23 to November 29
Ophiuchus
November 29 to December 17
Sagittarius
December 17 to January 20