Question: National Sports Stadium is a multi-purpose stadium in Ulaanbaatar, Mongolia, The Naadam festival, which celebrates Mongolian independence, is held there every when? 

Context articles: Mongolian Natural History Museum
Gorkhi-Terelj National Park
Naadam
Chuncheon Civic Stadium
National Sports Stadium (Mongolia)
MIAT Mongolian Airlines
Zaisan Memorial
Inner Mongolian independence movement
National Sports Stadium (Zimbabwe)
Barbourfields Stadium

The Mongolian Natural History Museum (Mongolian: Байгалийн түүхийн музей ) is a repository and research institution located in Ulaanbaatar, Mongolia.
 The museum was previously known as the Mongolian National Museum or State Central Museum.
 This change in name has often led to confusion with Ulaanbaatar's other preeminent museum, the National Museum of Mongolia.
 Although the two museums are located quite close to one another, they contain very different exhibits.
 The Mongolian National Museum focuses on the archaeology and history of Mongolia, while the Mongolian Natural History Museum is concerned primarily with the flora, fauna, geology and natural history of the country.
Gorkhi-Terelj National Park (Mongolian: Горхи-Тэрэлж ] , "creek-rhododendron") is one of the national parks of Mongolia.
 The Terelj tourist zone has a number of "tourist camps" (Mongolian: жуулчны бааз , "juulchny baaz").
 It is connected with Ulaanbaatar by a paved road (main road to the East #A0501 Baganuur-Öndörkhaan direction, 37 km from Ulaanbaatar city center, left turn to the branch #A24, 5 km later road crosses Tuul River and the National park territory begins).
 The road comes to the Gorkhiin Davaa (Mongolian: Горхийн даваа ) pass.
 Most of the tourist camps and tourist attractions are before this pass.
 The road then ends at the settlement of Terelj, which features small shops and restaurants.
 The Terelj settlement is located in the valley of the Terelj River ("Terelj Gol"), approximately 66 km from the Ulaanbaatar city center.
 The national park tourist zone is formally in Nalaikh düüreg (district) part of Ulaanbaatar municipality, the rest of the protected zone beginning to the north of the Terelj River, is located in Mongolia's Töv Province ("Töv aimag").
Naadam (Mongolian: Наадам , classical Mongolian: "Naɣadum", ] , "literally "games"") is a traditional festival in Mongolia.
 The festival is also locally termed "eriin gurvan naadam" (эрийн гурван наадам ) "the three games of men".
 The games are Mongolian wrestling, horse racing, and archery, and are held throughout the country during midsummer.
 Women have started participating in the archery and girls in the horse-racing games, but not in Mongolian wrestling.
Chuncheon Civic Stadium (Korean: 춘천공설운동장 ) was a multi-purpose stadium located in Chuncheon, Gangwon-do, South Korea.
 It was built in 1980 to hold Korean Junior Sports Festival.
 It also held Korean National Sports Festival twice, in 1985 and 1996.
 The stadium had a capacity of 35,000 people.
 In December 2008, because of the deterioration of its equipment, the stadium was demolished, and a new stadium, Chuncheon Stadium, was built in another place.
National Sports Stadium is a multi-purpose stadium in Ulaanbaatar, Mongolia.
 It is used mostly for football matches and has a capacity 12,500.
 The Naadam festival, which celebrates Mongolian independence, is held there every July.
 The land owned by the stadium company is about 27 hectares, of which the stadium takes about 8 hectares of land.
 The National Sport Stadium in Mongolia hosted the 2016 World University Archery Championship.
MIAT Mongolian Airlines (pronounced "me-at", Mongolian: Монголын Иргэний Агаарын Тээвэр , "Mongolyn Irgenii Agaaryn Teever (MIAT)", Mongolian Civil Air Transport) is the Mongolian national airline, headquartered in the MIAT Building in Ulaanbaatar, the capital of Mongolia.
 The airline operates international scheduled services from its base at Chinggis Khaan International Airport near Ulaanbaatar.
The Zaisan Memorial (Mongolian: Зайсан ) is a memorial in the southern area of the Mongolian capital of Ulaanbaatar that honors allied Mongolian and Soviet soldiers killed in World War II.
 Located on a hill in the southern part of the city, the memorial features a circular memorial painting that depicts scenes of friendship between the people of the USSR and Mongolia.
 The mural depicts scenes such as Soviet support for Mongolia's independence declaration in 1921, the defeat of the Japanese Kwantung Army by the Soviets at Khalhkin Gol on the Mongolian border in 1939, victory over Nazi Germany and peacetime achievements such as Soviet space flights including the flight of Soyuz 39 which carried the first Mongolian into space, Jugderdemidiin Gurragchaa.
The Inner Mongolian independence movement, also known as the Southern Mongolian independence movement, is a movement for the independence of Inner Mongolia (also known as "Southern Mongolia") and the political separation of Inner Mongolia from the People's Republic of China.
 It is principally led by the Mongolian diaspora in countries like Japan and the United States, and in some European countries.
The National Sports Stadium is a multi-purpose stadium, in Harare, Zimbabwe, with a capacity of 60,000 people.
 It is used mostly for football matches, but is also used for rugby union.
 CAPS United F.C. use the venue, which opened in 1987, for most of their home games.
Barbourfields Stadium is a multi-purpose stadium in Bulawayo, Zimbabwe, home to Highlanders FC.
 It is currently used mostly for football matches.
 It is owned by Bulawayo City Council and is home to Highlanders F.C., one of the biggest soccer teams in Zimbabwe.
 Soccer fans commonly refer to the stadium as "Emagumeni" meaning "our backyard" in iSiNdebele.
 As of 2017, Barbourfields Stadium may be used as homeground to other football teams in and around Bulawayo including Bantu Rovers FC, How Mine FC and Chicken Inn FC, but mostly, when they play big teams.
 The stadium consists of four stands including the most famous ones; the Mpilo End (usually for the away fans), and, of coarse, the Soweto End (for the 'die hard' home fans).
 It has a capacity of 40,000  making it the second largest stadium in Zimbabwe after the National Sports Stadium (60,000).