When did Sherlock Holmes die

He didn't die - in fact he never even lived! He was a fictional character invented by Sir Aurthur Conan Doyle, the author of the detective novels featuring Holmes.
He didn't die - in fact he never even lived! He was a fictional character invented by Sir Aurthur Conan Doyle, the author of the detective novels featuring Holmes.
THE AUTHOR of the Sherlock Holmes book series was Conan Doyle. He died in 1930.
According to Wikipedia:
'...he killed off Holmes in "The Final Problem", which appeared in print in 1893. After resisting public pressure for eight years, the author wrote The Hound of the Baskervilles, which appeared in 1901, implicitly setting it before Holmes' "death" (some theorise that it actually took place after "The Return" but with Watson planting clues to an earlier date).
The public, while pleased with the story, was not satisfied with a posthumous Holmes, and so Conan Doyle resuscitated Holmes two years later. Many have speculated on his motives for bringing Holmes back to life, notably writer-director Nicholas Meyer, who wrote an essay on the subject in the 1970s, but the actual reasons are not known, other than the obvious: Publishers offered to pay generously. For whatever reason, Conan Doyle continued to write Holmes stories for a quarter-century longer.
Some writers have come up with alternate explanations for the hiatus. In Meyer's novel The Seven-Per-Cent Solution, the Hiatus is depicted as a secret sabbatical following Holmes' treatment for cocaine addiction at the hands of Sigmund Freud, and presents Holmes making the light-hearted suggestion that Watson write a fictitious account claiming he'd been killed by Moriarty, saying of the public: "They'll never believe you in any case."
In his memoirs, Conan Doyle quotes a reader, who judged the later stories inferior to the earlier ones, to the effect that when Holmes went over the Reichenbach Falls, he may not have been killed, but he was never quite the same man after.