|1936||In 1936, Kostanay region was established|
|2000||In 2000, the last gallery of the Semipalatinsk Test Site was destroyed|
29 July 1936
Administrative centre — Kostanay city. Territory — 196 thousand square km. The region borders on four regions of the Republic of Kazakhstan (Aktobe, Karaganda, Akmola and North-Kazakhstan regions) and three regions of the Russian Federation (Orenburg, Chelyabinsk and Rurgan regions).
On June 17, 1997 by the Decree of the President of Kazakhstan the transcription of the city’s name Kustanay was changed to Kostanay, while Kustanay region — to Kostanay region. More than hundred nationalities live here.
29 July 2000
On August 29, by the Decree of the President of the Republic of Kazakhstan the Semipalatinsk Test Site was officially closed, nuclear explosions on the territory of Kazakhstan were stopped once and for all. This was followed by the international moratorium on nuclear weapons tests: test site in Russia (Novaya Zemlya), USA (Nevada), France (atoll Moruroa) and China (Lop Nor) also were closed.