Many Sailors believe it's bad luck to leave port on a Friday. There is a longstanding superstition in the British Royal Navy that it's unlucky to begin a voyage on a Friday. That has led to the story of the HMS Friday.
The reluctance of seamen to sail on a Friday reached such epic proportions, that in the 19th century, the British Government decided to take strong measures to prove the fallacy of the superstition. They laid the keel of a new vessel on Friday, selected her crew on a Friday, launched her on a Friday and named her HMS Friday. Then, Captain James Friday was placed her in command and sent her to sea for the first time on a Friday. The scheme worked well, and had only one drawback ... neither ship nor crew was ever heard from again.
Although HMS Friday is believed to be false, This century old story tells of the superstitious nature of sailors.