Mar 22, 1964: Herb Caen coins now-iconic "Dr. Strange[g]love" pun.

Judging from a column published 2 days earlier by Ventura County Star-Free Press sports editor Chuck Thomas (which applies the identical punch line to the then currently practicing MD/erstwhile Yankee 3B Bobby Brown but nonetheless credits Caen as its creator), this is almost certainly a reprint from a then recent edition of Caen's SF Chronicle column.