When is Van Gogh's death?

July 29, 1890
(according to Wikipedia)

That date was verified on IMDb: 29 July 1890, Auvers-sur-Oise, France (suicide)
http://www.imdb.com/name/nm0994883/

But I believe that according to a new biography of the artist, the writer if I heard correctly may have been shot by someone else and ultimately murdered rather then commit suicide.

You heard correctly, but according to the witnesses van Gogh lived some time after the shot ( up to an hour?) and verified himself that he had shot himself.

One theory was that he was shot by a minor but claimed it was self inflicted in order to protect the boy.

...and none of that alters the date of demise.

The death of Vincent van Gogh, the Dutch post-Impressionist painter, occurred in the early morning of 29 July 1890, in his room at the Auberge Ravoux in the village of Auvers-sur-Oise in northern France.

Van Gogh committed suicide in Orville in 1890: July 27, 1890 relapse, shot suicide, on 29th one o'clock in the morning Xu, under the guard of AO and Dr. Rest Stop breathing.