The full softball schedule is available here
Sunday, April 7, 2013: at Villanova, 1:00 PM (source)
Friday, April 12, 2013: vs. Cincinnati, 3:00 PM (source)
Friday, April 26, 2013: at Georgetown, 4:00 pm (source)
There is also a tournament at Central Florida against UCF and Michigan, date unknown.(Above quote from Chris Jones)
There is also a tournament at Stetson the weekend of March 1 against Stetson, Ohio State, and Central Michigan.
They have a 3 game series at Presbyterian over spring break and one game at College of Charleston.
They also have a 3 game road series at Sam Houston State.
They have a 3 game series against George Mason the last weekend of the season and will probably play 24 conference games.
Update: Notre Dame will play 24 conference games, 3 each against 8 opponents, presumably we will too
Friday, February 15, 2013: vs. Indiana @ Dunedin, FL, 4:00 PM (source)
Saturday, February 16 or Sunday February 17: vs. Purdue in Dunedin, FL (source)
Friday, April 26: at Notre Dame, 5:35 PM
Saturday, April 27: at Notre Dame, 2:05 PM
Sunday, April 28: at Notre Dame, 1:05 PM