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

Compulsory abstract submission for all papers: 17th of January, 2015 (sharp)
Compulsory full paper submission: 19th of January, 2015 (sharp)
Authors rebuttal: 18th-24th of February, 2015 
Acceptance notification: 9th of March, 2015 
Camera ready: 18th of March, 2015

Demos (23:59 Hawaii time):

Submission deadline: March 13th, 2015
Notification of acceptance: April 6th, 2015 
Camera-ready paper: April 20th, 2015 

Workshops (23:59 Hawaii Time):

Submission deadline: Friday March 16, 2015 - DEADLINE EXTENDED​​
Notifications: Friday April 3, 2015
Camera-ready version: Friday April 17, 2015
Workshop days: Sunday May 31 and Monday June 1, 2015

Tutorials (23:59 Hawaii Time):

Proposals due: Friday 5th December, 2014  - DEADLINE EXTENDED
Notification of acceptance: December 15th, 2014 
Tutorial Web site online: December 22nd, 2014
Tutorial materials uploaded: April 22nd, 2015
Tutorial days: May 31st – June 1st, 2015

Posters (23:59 Hawaii Time):

Submission deadline: March 13th, 2015
Notification of acceptance: April 6th, 2015
Camera-Ready Paper: April 20th, 2015

PhD Symposium (23:59 Hawaii Time):

Submission deadline: January 12th, 2015
Notification of acceptance: February 9th, 2015
Revised version of submission to mentor: February 26th, 2015
Final version: March 13th, 2015
Draft presentation to mentor: May 12th, 2015

Semantic Web Evaluation Calls (23:59 CET):

Challenge papers submission deadline – see challenge website​
Challenge paper reviews due – see challenge website​
Camera ready papers due - see challenge website
Submission of challenge results – free choice of organizers
Proclamation of winners – During ESWC closing Ceremony

*To check all deadlines please visit respective Web pages under 'Calls & Dates' menu item.

Minute of Madness

One ODF slide submission: May 31st, 2015 (23:59 Hawaii time)​
Session: 2nd of June at 17:30 (local time)​