Susan Day earned music degrees from Ithaca College and Columbia University. She was Colorado ASTA Teacher of the Year in 2000 and winner of the 1997 National ASTA Composition Contest for her string bass duet, "Bass-ic Blues for Two," recorded by Gary Karr.
Susan Day's award-winning school orchestras were selected to perform seven times at state and national conventions. Her compositions have been performed by youth orchestras at MENC and CMEA national and state conventions, The Midwest Clinic, music camps, youth symphony concerts, district festivals, and state contests.
Susan Day was the winner of the 2006 Texas Orchestra Directors Association (TODA) Composition Contest for her piece "Tango d'Amour" and also the 2008 winner of the Merle J. Isaac Composition Contest for her piece "Shores of Ireland." She was the winner of the 2011 TODA Composition Contest for her piece "Tango Mysterioso." In July 2015, Susan Day was Composer-in-Residence at the Ohio State University Summer String Teacher Workshop.
Susan Day was inducted into the Colorado Music Educators Association (CMEA) Hall of Fame in January, 2008.