Conversation so far:
where did JFK give his speech in berlin
President John F. Kennedy spoke from a platform erected on the steps of Rathaus Schöneberg in West Berlin.
what was the name of speech given by President John F. Kennedy at Rudolph at the steps of Rathaus Schöneberg in West Berlin
Ich bin ein Berliner is a speech by United States President John F. Kennedy given in West Berlin.

Question: when was the speech
Self-contained rewrite: when was the Ich bin ein Berliner speech given by President John F. Kennedy at the steps of Rathaus Schöneberg in West Berlin.