When was American actor who acted Spock in The City on the Edge of Forever born? 
The City on the Edge of Forever:  In the episode, after Doctor Leonard McCoy (DeForest Kelley) travels back in time and changes history, Kirk (William Shatner) and Spock (Leonard Nimoy) follow him to correct the timeline. Leonard Nimoy: Leonard Simon Nimoy ( ; March 26, 1931 – February 27, 2015) was an American actor, film director, photographer, author, singer and songwriter.
March 26, 1931