Zimtrim has 1 happy day concert.

Happy Day is a punk rock/melodic punk/pop punk from Jakarta, Indonesia. But they prefer to describe their music as "Punk n Roll". Happy Day was officially formed in January 2004. They are Didi Priyadi (Vocal and guitar), Anton Cahyadi (Bass), and Andre Setiawan (Drums). In between 2005-2006 they recorded they debut album, featuring 12 songs, entitled Ini Musik Gue!! and was released in June 2006 thru Didi's own record label, Fullblast Music. The second album, Maksa, was released in early 2010 via the same record label.