The phrase "under God" was incorporated into the Pledge of Allegiance on June 14, 1954, by a Joint Resolution of Congress amending 4 of the Flag Code enacted in 1942.

Answer this question based on the passage: when did they add under god in the pledge of allegiance? OK. Let's think. My stream of consciousness:
The relevant information is: The phrase "under God" was incorporated into the Pledge of Allegiance on June 14, 1954, by a Joint Resolution of Congress amending 4 of the Flag Code enacted in 1942. The answer is June 14 , 1954.