
Given the following passage

"The joint mission began when Soyuz 19 was first launched on July 15, 1975 at 12:20 UTC, and the Apollo craft was launched with the docking module six and a half hours later. The two craft rendezvoused and docked on July 17 at 16:19 UTC. The three astronauts conducted joint experiments with the two cosmonauts, and the crew shook hands, exchanged gifts, and visited each other's craft.",

answer the following question. Note that the answer is present within the text.

Question: When did the joint mission start? 

July 15, 1975 at 12:20 UTC
