BTS ARMY's birthday project moves Jimin at Lima concert. At BTS' final Lima concert, Peruvian ARMYs surprised Jimin with early birthday wishes, singing Happy Birthday and displaying special hand-banners ahead of his October 13 birthday. Moved by the gesture, Jimin said, 'Being born and going through this life makes me feel life is truly worth living.' BTS members also sang for him during soundcheck.