Watching for this, here's what I've found so far:
https://www.cnn.com/2020/06/22/politics/biden-trump-debates/index.html
In a letter to the Commission on Presidential Debates, obtained by CNN and first reported by The Washington Post, Biden campaign manager Jen O'Malley Dillon said Biden will face off with Trump in those debates already planned -- on September 29, October 15 and October 22. A vice presidential debate will be held on October 7.
--
https://www.townandcountrymag.com/society/politics/a32082680/presidential-debates-joe-biden-donald-trump-schedule/
The first presidential debate, when the incumbent President Trump will face off against Joe Biden, will be held on Tuesday, September 29 at the University of Notre Dame in Indiana. The second presidential debate was expected to take place at the University of Michigan in Ann Arbor on Thursday, October 15, but in June, the institution withdrew from hosting the event due to health concerns amid the ongoing coronavirus pandemic.
“It is with great disappointment that I must ask for the University of Michigan to be released from its agreement with the Commission on Presidential Debates to host the Presidential Debate on Oct. 15, 2020,” Michigan’s president, Mark Schlissel, said in a statement Tuesday.
“In consideration of the public health guidelines in our state as well as advice from our own experts — we feel it is not feasible for us to safely host the presidential debate as planned.’’
A replacement location has not been announced. The final debate is set for Thursday, October 22 at Belmont University in Nashville.
Despite the change in location, all three debates are expected to begin at 9 p.m. ET, and will run for 90 minutes without any commercial breaks. No moderators have been announced as yet.
--