HAPPENIN’ OTSEGO for SUNDAY, APRIL 23 State Gymnastics Championships GYMNASTICS CHAMPIONSHIPS – 9 a.m. 225 gymnasts from across New York State meet to show their skills. SUNY Oneonta. Info, call Oneonta YMCA (607)432-0010 or visit www.oneontaymca.org/programs_pages/gymnastics/ymca-nys-gymnastics-championships.html MUSIC – Noon. The Binghamton Morris men and friends welcome spring back to the northeast with a live performance. The Major’s Inn, 104 Marion Avenue, Gilbertsville. Info, www.facebook.com/binghamton.morris/…