50 years ago today - Oct 12, 1961 - 18 September 1963

[1st Presidency Changes] David O. McKay Henry D. Moyle Hugh B. Brown Henry D. Moyle called as First Counselor; Hugh B. Brown called as Second Counselor

[Source: Wikipedia, First Presidency (LDS Church), http://en.wikipedia.org/wiki/First_Presidency_(LDS_Church)#Chronology_of_the_First_Presidency]