Here are voter registration dates and election dates in Georgia for the Presidential Preference Primary, the General Primary Election and Runoff and the General Election and Runoffs.
February 1, 2016: Last day to register for Presidential Preference Primary
March 1, 2016: Presidential Preference Primary
April 26, 2016: Last day to register for General Primary Election
May 24, 2016: General Primary Election, Nonpartisan General Election, and Special Runoff Election
July 26, 2016: General Primary Runoff, Nonpartisan General Runoff Election, and Special Runoff Election Date
October 11, 2016: Last day to register for General Election
November 8, 2016: General Election
December 6, 2016: General Election Runoff Date for Local and State Offices
January 10, 2017: General Election Runoff Date for Federal Offices
>> See more key election dates in Georgia
http://accesswdun.com/article/2015/12/356057/key-election-dates-in-georgia