Commission on Presidential Debates: The debate schedule, from the organization that set the dates. [View all]
http://www.debates.org/
This was announced in their Sep 23, 2015 news release. You can read the news release here:
http://www.debates.org/index.php?page=2016debates
2016 Presidential Debates
Monday, Sep 26, 2016 - First presidential debate, Hofstra University, Hempstead, NY
Tuesday, Oct 4, 2016- Vice presidential debate, Longwood University, Farmville, VA
Sunday, Oct 9, 2016- Second presidential debate, Washington University in St. Louis, St. Louis, MO
Wednesday, Oct 19, 2016- Third presidential debate, University of Nevada, Las Vegas, Las Vegas, NV
"Our Mission
The Commission on Presidential Debates (CPD) was established in 1987 to ensure that debates, as a permanent part of every general election, provide the best possible information to viewers and listeners. Its primary purpose is to sponsor and produce debates for the United States presidential and vice presidential candidates and to undertake research and educational activities relating to the debates. The organization, which is a nonprofit, nonpartisan, 501(c)(3) corporation, sponsored all of the presidential debates in 1988, 1992, 1996, 2000, 2004, 2008, and 2012."
I've augmented the page copies to include the day of the week on which each debate falls, since this has now been thrust into the campaign news cycle.