Legendary Lower East Side punk rockers D Generation are back in full-swing with European and U.S. dates confirmed. The tour kicks off this month in Spain and London, leading up to a headlining show at Irving Plaza on Sept. 17 in their hometown of New York City. D Generation’s music is a combination of ‘70s punk, grunge and alternative rock. The gang will be performing material from their three full-length records, D Generation, No Lunch and Through The Darkness. After the tour, the group will be back in the studio writing new material for a 2012 release. Doors open at 7 p.m.