Immediately following the annual meeting of scientists who conduct research at the Relativistic Heavy Ion Collider (RHIC) and the Alternating Gradient Synchrotron (AGS), the U.S. Department of Energy's (DOE) Brookhaven National Laboratory hosted a science symposium to commemorate the end of RHIC operations. The two-day event, held May 14 and 15, celebrated more than 25 years of discovery science at RHIC and kicked off the transition to the future Electron-Ion Collider (EIC).