Green Day have begun demoing for their next album. Frontman Billie Joe Armstrong recently told Kerrang! magazine:

“We did some demos in Berlin, some in Stockholm, some just outside of Glasgow and some in Amsterdam …. We wanted to get [the new songs] down in some early form.”

The band released 21st Century Breakdown in 2009. Dates for an American summer tour alongside AFI are expected to be announced soon.
Source Green Day have begun demoing for their next album. Frontman Billie Joe Armstrong recently told Kerrang! magazine:

“We did some demos in Berlin, some in Stockholm, some just outside of Glasgow and some in Amsterdam …. We wanted to get [the new songs] down in some early form.”

The band released 21st Century Breakdown in 2009. Dates for an American summer tour alongside AFI are expected to be announced soon.
Source