Take a look to the dates you have to remember.

      Long & Short Paper submission:  28th April 2015
      Abstract submission:   28th April 2015
      Call for Late Breaking Papers/Abstracts:  22nd June 2015
      Call for Late Breaking Posters/Demos:  22nd June 2015
      Long & Short Paper notification:  13rd May 2015
      Abstract Notification:  13rd May 2015
      Notification Late Breaking Papers/Abstracts:  29th June 2015
      Notification Late Breaking Posters/Demos:  29th June 2015
      Camera-ready submission:  28th May 2015
      Early Registration:  29th June 2015