The important deadlines are:

April 21, 2017 - Abstract submission NEW deadline
April 24, 2017 - Notification of acceptance of abstract

June 1st, 2017 - Opening of the online payment for registration
June 30, 2017 - Submission of full paper NEW deadline

June 30, 2017 - Early bird registration deadline

July 14, 2017 - Notification of acceptance of full paper
July 31, 2017 - Final registration deadline

August 21st, 2017 - Submission of revised full paper

September 1st, 2017 - Notification of acceptance of revised full paper