BBC Radio One has announced that Green Day will be interviewed on Zane Lowe's radio show tonight, which airs at 7:00pm in the UK or 2pm est. From the time of this being posted there is exactly two hours until the show starts.
I believe that the guys will just be on the show for an interview and not a performance, but only time will tell. We will have audio of the show up after it airs. You can stream the show live on the Radio One website.
Edit 3:20pm EST: Here's the full interview along with a few clips of new songs off of the bands upcoming trilogy of albums.
On a related note, Green Day will be on BBC Breakfast tomorrow morning. The program will air at 6.50am, 7.50am, and 8.50am local time.