Major League Baseball owners and the Major League Umpires Association reach an agreement on a five-year contract, ending the walk-out. Regular umpires will return to work on May 3rd.
On May 1, 1995 — Major League Baseball owners and the Major League Umpires Association reach an agreement on a five-year contract, ending the walk-out. Regular umpires will return to work on May 3rd.
Source
Baseball Reference May 1