Green Day have been celebrating the 30th anniversary of their second album ‘Kerplunk!’ on social media.The band’s sophomore record – their first to feature Tré Cool on drums – was released on December 15, 1991, via Lookout! Records; it was their last on the independent label.All three members of the band have taken to social media to pay tribute to the album – which Reprise Records reissued on vinyl in 2009, alongside a reissue of their ‘Sweet Children’ EP – the title of which referenced the