Research and In-Use Tracks (23:59 Hawaii time):

Compulsory abstract submission for all papers: December 11, 2015 (sharp)
Compulsory full paper submission: December 18, 2015 (sharp)
Authors rebuttal: January 29 - February 5, 2016 
Acceptance notification: February 22, 2016 
Camera ready: March 7, 2016

Workshops Proposals (23:59 Hawaii Time):

Submission deadline: November 20, 2015
Notifications of acceptance: December 4, 2015
Workshop website due: December 22, 2015
Workshop days: Sunday May 29 and Monday May 30, 2016

Tutorials (23:59 Hawaii Time):

Tutorial proposals due: November 20, 2015
Notification of acceptance: December 4, 2015 
Tutorial Web site due: December 18, 2015
Camera-ready material due: April 22, 2016 
Tutorial days: Sunday May 29 and Monday May 30, 2016

ESWC Challenges (23:59 Hawaii Time):

Training data ready and challenges Calls for Papers sent: Friday January 15th, 2016
Challenge papers submission deadline: Monday March 21st​, 2016
Challenge paper reviews due: Tuesday April 5th, 2016
Notifications sent to participants: Friday April 8th, 2016
Camera ready papers due: Sunday April 24th, 2016​

PhD Symposium Call (23:59 Hawaii Time):

Submission deadline: December 18, 2015
Notification of acceptance: January 24, 2016
Revised version to mentor: February 7, 2016
Mentor’s feedback on paper: February 19, 2016
Final version: March 7, 2016
Draft presentation to mentor: May 10, 2016
Mentor’s feedback on presentation: May 20, 2016
PhD Symposium: May 30, 2016 

ESWC Posters (23:59 Hawaii Time):

Submission deadline: March 10, 2016
Notification of acceptance: April 4, 2016
Camera-ready paper: April 18, 2016

ESWC Demos  (23:59 Hawaii Time):

Submission Deadline: March 10, 2016
Notification of Acceptance: April 4, 2016
Camera-Ready Paper: April 18, 2016

Call for EU Project Networking (23:59 Hawaii Time):

Abstract submission deadline: April 22th, 2016, 23:59
Notification of acceptance/rejection: April 25th, 2016, 23:59
EU Project Networking Session: June 1st, 2016