How did the idea to make three albums come about?

“We started off when we were in Europe, and I’d write songs on days off then we’d go into a studio and just mess around, whether it was in Glasgow or Helsinki or Berlin. And then when we got home from the 21st Century [Breakdown] tour, I started writing a lot. I just wanted to get back into writing sort of basic punk-rock, power-pop kind of songs, the kind of songs that I grew up listening to and loved.

“I started making some demos and then I showed them to Mike and Tre and Jason White – our second guitar player [and long-time touring guitarist]. The four of us just ended up getting in a room all together and hashing out the arrangements and getting to know the songs. We were just kind of getting our hands dirty with it.”

It’s an ambitious prospect. How did you decide which songs would end up on each of the albums?

“The more that we played together, and the more the songs kept coming, we kept making different lists for sequences right when we got up to about 27 songs. We kept on making these lists, trying to figure out which songs sounded cohesive together. ¡Uno! is kind of like a more raw, back-to-basics Green Day sound.

"¡Dos! is more like [Green Day side-project] the Foxboro Hot Tubs or something – it’s more garage-y and kind of wild and sexual. There are more songs about f**king and things like that; it gets pretty wild and there’s kind of a party atmosphere to it. And then, the third one, there’s a bit more sweetness to it and a bit more reflection going on, but maintaining the energy that Green Day has going on.”