Question: When did the country in whose capitol the person after whom Korolyov was named resided stop using the Julian calendar?

full_context: Document 1: Korolyov, Moscow Oblast: In July 1996, the city was renamed in commemoration of Sergei Korolev, the father of the Soviet/Russian space program, who died in 1966. Since 1997, Korolyov has hosted the International Space Olympics, an annual competition for young people, to promote space related research.
Document 2: Space Race: The Soviet Union duplicated its dual-launch feat with Vostok 5 and Vostok 6 (June 16, 1963). This time they launched the first woman (also the first civilian), Valentina Tereshkova, into space on Vostok 6. Launching a woman was reportedly Korolev's idea, and it was accomplished purely for propaganda value. Tereshkova was one of a small corps of female cosmonauts who were amateur parachutists, but Tereshkova was the only one to fly. The USSR didn't again open its cosmonaut corps to women until 1980, two years after the United States opened its astronaut corps to women.
Document 3: Space Race: In 1953, Korolev was given the go-ahead to develop the R-7 Semyorka rocket, which represented a major advance from the German design. Although some of its components (notably boosters) still resembled the German G-4, the new rocket incorporated staged design, a completely new control system, and a new fuel. It was successfully tested on August 21, 1957 and became the world's first fully operational ICBM the following month. It would later be used to launch the first satellite into space, and derivatives would launch all piloted Soviet spacecraft.
Document 4: Moscow: Moscow is situated on the Moskva River in the Central Federal District of European Russia, making it Europe's most populated inland city. The city is well known for its architecture, particularly its historic buildings such as Saint Basil's Cathedral with its brightly coloured domes. With over 40 percent of its territory covered by greenery, it is one of the greenest capitals and major cities in Europe and the world, having the largest forest in an urban area within its borders -- more than any other major city -- even before its expansion in 2012. The city has served as the capital of a progression of states, from the medieval Grand Duchy of Moscow and the subsequent Tsardom of Russia to the Russian Empire to the Soviet Union and the contemporary Russian Federation.
Document 5: Space Race: Gagarin became a national hero of the Soviet Union and the Eastern Bloc, and a worldwide celebrity. Moscow and other cities in the USSR held mass demonstrations, the scale of which was second only to the World War II Victory Parade of 1945. April 12 was declared Cosmonautics Day in the USSR, and is celebrated today in Russia as one of the official "Commemorative Dates of Russia." In 2011, it was declared the International Day of Human Space Flight by the United Nations.
Document 6: Soviet calendar: While the Gregorian calendar was implemented in Soviet Russia in February 1918 by dropping the Julian dates of 1 -- 13 February 1918 pursuant to a Sovnarkom decree, the Soviet calendar added five - and six - day work weeks between 1929 and 1940. Although the traditional seven - day week was still recognized, a day of rest on Sunday was replaced by one day of rest in each work week. Many sources erroneously state that the weeks were organized into 30 - day months from Roman calendar.
Document 7: Moscow: Moscow (/ ˈmɒskoʊ / or / ˈmɒskaʊ /; Russian: Москва́, tr. Moskva, IPA: (mɐˈskva) (listen)) is the capital and most populous city of Russia, with 12.2 million residents within the city limits and 17.1 million within the urban area. Moscow has the status of a Russian federal city.
Document 8: Russia: Russia (/ ˈrʌʃə / (listen); Russian: Росси́я, tr. Rossiya; IPA: (rɐˈsjijə)), also officially known as the Russian Federation (Russian: Российская Федерация, tr. Rossiyskaya Federatsiya; IPA: (rɐˈsijskəjə fjɪdjɪˈratsɨjə)), is a country in Eurasia. At 17,125,200 square kilometres (6,612,100 sq mi), Russia is the largest country in the world by surface area, covering more than one - eighth of the Earth's inhabited land area, and the ninth most populous, with over 144 million people at the end of March 2016. The European western part of the country is much more populated and urbanised than the eastern; about 77% of the population live in European Russia. Russia's capital Moscow is one of the largest cities in the world; other major urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Chelyabinsk, Nizhny Novgorod, Ufa, and Kazan.
Document 9: Laika (comics): Based on a true story, the graphic novel tells the story of Laika from multiple points of view: from that of the ambitious Sergey Korolyov, Chief Engineer responsible for the launching and construction of Sputnik 2; to that of Yelena Dubrovsky, official trainer of the space-bound dogs; to that of Oleg Gazenko, scientist; and finally from the viewpoint of Laika herself, who had lived as a stray on the streets of Moscow.
Document 10: Dog: Dogs have lived and worked with humans in so many roles that they have earned the unique nickname, "man's best friend", a phrase used in other languages as well. They have been bred for herding livestock, hunting (e.g. pointers and hounds), rodent control, guarding, helping fishermen with nets, detection dogs, and pulling loads, in addition to their roles as companions. In 1957, a husky-terrier mix named Laika became the first animal to orbit the Earth.
Document 11: Gregorian calendar: Most Western European countries changed the start of the year to 1 January before they adopted the Gregorian calendar. For example, Scotland changed the start of the Scottish New Year to 1 January in 1600 (this means that 1599 was a short year). England, Ireland and the British colonies changed the start of the year to 1 January in 1752 (so 1751 was a short year with only 282 days) though in England the start of the tax year remained at 25 March (O.S.), 5 April (N.S.) till 1800, when it moved to 6 April. Later in 1752 in September the Gregorian calendar was introduced throughout Britain and the British colonies (see the section Adoption). These two reforms were implemented by the Calendar (New Style) Act 1750.
Document 12: Gregorian calendar: In conjunction with the system of months there is a system of weeks. A physical or electronic calendar provides conversion from a given date to the weekday, and shows multiple dates for a given weekday and month. Calculating the day of the week is not very simple, because of the irregularities in the Gregorian system. When the Gregorian calendar was adopted by each country, the weekly cycle continued uninterrupted. For example, in the case of the few countries that adopted the reformed calendar on the date proposed by Gregory XIII for the calendar's adoption, Friday, 15 October 1582, the preceding date was Thursday, 4 October 1582 (Julian calendar).
Document 13: Sputnik 2: Sputnik 2 (, , "Satellite 2"), or Prosteyshiy Sputnik 2 (PS-2, , "Elementary Satellite 2") was the second spacecraft launched into Earth orbit, on 3 November 1957, and the first to carry a living animal, a Soviet space dog named Laika. Laika survived for several orbits but died a few hours after the launch.
Document 14: Laika: Laika In November 1957, Laika became the first animal launched into Earth orbit, paving the way for human spaceflight during the upcoming years. This photograph shows her in a flight harness. Other name (s) Kudryavka Species Canis lupus familiaris Breed Mongrel, possibly part - husky (or part - Samoyed) and part - terrier Sex Female Laika Лайка c. 1954 Moscow, Soviet Union 3 November 1957 (aged 3) Sputnik 2, in Low Earth orbit Years active 1957 Known for First animal to orbit the Earth Owner Soviet space program Weight 5 kg (11 lb)
Document 15: Gregorian calendar: The Gregorian calendar is a solar calendar. A regular Gregorian year consists of 365 days, but as in the Julian calendar, in a leap year, a leap day is added to February. In the Julian calendar a leap year occurs every 4 years, but the Gregorian calendar omits 3 leap days every 400 years. In the Julian calendar, this leap day was inserted by doubling 24 February, and the Gregorian reform did not change the date of the leap day. In the modern period, it has become customary to number the days from the beginning of the month, and February 29th is often considered as the leap day. Some churches, notably the Roman Catholic Church, delay February festivals after the 23rd by one day in leap years.
ground_truth: February 1918
sub_queries: Korolyov >> named after Answer: Sergei Korolev
Sergei Korolev >> residence Answer: Moscow
Moscow is the capital city of which country Answer: Russia
when did Russia stop using the julian calendar Answer: February 1918