Give a stream of consciousness and then the final answer. It was not until about 12: 45 a.m., an hour after Titanic struck the iceberg at 11: 40 p.m. on 14 April, that the first lifeboat was lowered into the sea. The boats were lowered in sequence, from the middle forward then aft, with First Officer William McMaster Murdoch, Third Officer Herbert Pitman and Fifth Officer Harold Lowe working on the starboard side, and Chief Officer Henry Tingle Wilde and Second Officer Charles Lightoller working on the port side, with the assistance of Captain Smith. The collapsible boats were dealt with last, as they could not be launched until the forward davits were clear.

Answer this question: when was the first lifeboat launched on the titanic?
This is the relevant information: It was not until about 12: 45 a.m., an hour after Titanic struck the iceberg at 11: 40 p.m. on 14 April, that the first lifeboat was lowered into the sea.
So, the final answer is 12 : 45 a.m. , an hour after Titanic struck the iceberg at 11 : 40 p.m. on 14 April.