Sadly, two years
April 2013
The Legend of Korra: Book 2 - Spirits will begin airing on Nickelodeon in the United States in September 2013.
The season finale of the Legend of Korra, Book Two: Spirits, premiered on November 22, 2013.
September Icant wait
Season 2 of The Legend of Korra was called Book 2: Spirits and the release date was September 13, 2013.
Well as I know and find out is The new seriese the legend of Korra will Have Two (2) books only and the book 1(Air) Have 12 chapters and and book 2 ( don't know what will be about) will have 16 chapters and I don't know if they will change Their Mind or Not cuz the director is pretty creepy first he make his mind to make book 4 but after that he changed agin...,,,, we miss Ang :(
Yes, Mako and Korra will be together in Season 2.
The Legend of Korra - Book 2: Spirits will be about Avatar Korra's connecting to her spiritual side. It will feature a journey around the world, the South Pole being attacked by Dark Spirits, a civil war between the water tribes, and the origin of the avatar.
Nickelodeon have said that they may be releasing Book 2: Spirits of the Legend of Korra in February 2013. That may just be the trailers for Book 2 they haven't officially announced full details. Hopefully it will be out soon as we are crrently in March. :)
The Legend of Korra Book 1: Air premiered on April 14, 2012. Book 2: Spirits premiered on September 13, 2013. Book 3: Change premiered on June 27, 2014. Book 4: Balance premiered on October 3, 2014.
The Legend of Korra - 2012 Skeletons in the Closet - 1.11 was released on: USA: 23 June 2012
The Legend of Korra - 2012 The Southern Lights 2-2 was released on: USA: 13 September 2013