If the last day of your conference falls between:The deadline is:
January 1 - January 31December 15th 5PM
February 1 - February 28 (or 29)January 15th 5PM
March 1 - March 31February 15th 5PM
April 1 - April 30March 15th 5PM
May 1 - May 31April 15th 5PM
June 1 - June 30May 15th 5PM
July 1 - July 31June 15th 5PM
August 1 - August 31July 15th 5PM
September 1 - September 30August 15th 5PM
October 1 - October 31September 15 5PM
November 1 - November 30October 15th 5PM
December 1 - December 31November 15th 5PM