Question: When did the monarch of Norway ascend to the throne?

full_context: Document 1: Medal for Heroic Deeds: The Medal for Heroic Deeds was instituted by royal resolution on 19 August 1885 and is awarded for honorable actions in saving lives or a comparable act. There was originally three classes, but from 1905 the medal has been awarded in gold and silver. To be awarded in gold the recipient must have committed an unusually notable rescue of life where the rescuer's life was put at risk. The medal is surmountet by the Crown of Norway and the adverse side features the portrait, name and title of the reigning monarch. At present the portrait is of King Harald V of Norway and the inscription reads «Harald den 5, Norges Konge» ("Harald the fifth, King of Norway"). The reverse features an oak reaf and the words «For edel dåd» ("For noble deed"). The ribbon is in the national colours of Norway: red, white and blue.
Document 2: Harald Bluetooth: Harald "Bluetooth" Gormsson (Old Norse: "Haraldr Gormsson" , Danish: "Harald Blåtand Gormsen" , died c. 985/86) was a king of Denmark and Norway.
Document 3: Royal Norwegian Order of Merit: The Royal Norwegian Order of Merit (Norwegian, "Den Kongelige Norske Fortjenstorden") was instituted by King Olav V in 1985. It is awarded to foreigners, Norwegian citizens living abroad, Ministry of Foreign Affairs diplomats, foreign civil servants in Norway, and Norway's honorary consuls for "outstanding service in the interests of Norway". Its counterpart, the Royal Norwegian Order of St. Olav, is generally only awarded to Norwegian citizens living in Norway.
Document 4: Vajiralongkorn: Maha Vajiralongkorn Bodindradebayavarangkun (Thai: มหาวชิราลงกรณ บดินทรเทพยวรางกูร , rtgs: "Mahawachiralongkon Bodinthrathepphayawarangkun" ,  ] ; born 28 July 1952) is the King of Thailand, since 2016. He is the only son of King Bhumibol Adulyadej and Queen Sirikit. In 1972, at the age of 20, he was made crown prince by his father. After his father's death on 13 October 2016, he was expected to succeed to the throne of Thailand but asked for time to mourn before taking the throne. He accepted the throne on the night of 1 December 2016 but will not be crowned formally until after the cremation of his father, expected to be on 26 October 2017. His father Bhumibol's coronation took place four years after his accession. The government retroactively declared his reign to have begun on 13 October 2016, upon his father's death. As the tenth monarch of the Chakri Dynasty, he is also styled as Rama X. At the age of 64, Vajiralongkorn is the oldest Thai monarch to ascend to the throne.
Document 5: Haakon, Crown Prince of Norway: Haakon, Crown Prince of Norway (] ; Haakon Magnus; born 20 July 1973) is the only son and younger child of King Harald V and heir apparent to the throne of Norway.
Document 6: Nordmannen: Nordmannen ("The Norwegian") is a Norwegian poem written by Ivar Aasen. The poem is better known in Norway as "Mellom bakkar og berg" (Literally "Between hills and mountains"), and was published for the first time in the collection of poems called "Symra" in 1863. Some parts of this poem are widely sung in Norway, and the two first stanzas were engraved on all Norwegian driving licences from 1998 to 30 June 2007. It is generally considered the third most important national song in Western Norway after the national anthem itself Ja, vi elsker and . It was in 2005 chosen as the national anthem for Western Norway by the founders of the Republic of Gulating.
Document 7: Princess Astrid, Mrs. Ferner: Princess Astrid, Mrs. Ferner (Astrid Maud Ingeborg; born 12 February 1932 in Oslo, Norway) is the second daughter of King Olav V of Norway and his wife, Princess Märtha of Sweden. She is the older sister of King Harald V of Norway and younger sister of the late Princess Ragnhild.
Document 8: NHH Symposium: The NHH Symposium is a biennial, two day business conference held at the Norwegian School of Economics (NHH), Bergen, Norway. The inaugural meeting, inspired by the St. Gallen Symposium, was held in 1983. The meeting is convened by volunteer students. Keynote speakers have included Edward Heath and Henry Kissinger. The Norwegian king, Harald V attended in 1995 and +Haakon, Crown Prince of Norway in 2007 and 2009.
Document 9: Princess Märtha Louise of Norway: Princess Märtha Louise of Norway (born 22 September 1971) is the only daughter and elder child of King Harald V and Queen Sonja. She is fourth in the line of succession to the Norwegian throne, after her brother Haakon, and his two children.
Document 10: Norwegian Confederation of Trade Unions: The Norwegian Confederation of Trade Unions (Norwegian: "Landsorganisasjonen i Norge" , LO) is a national trade union center, decidedly the largest and probably the most influential umbrella organization of labour unions in Norway. The 21 national unions affiliated to the LO have almost 900,000 members of a Norwegian population of 5 million. The majority of affiliated unions organizes traditional blue collar workers, but the largest affiliate is the Norwegian Union of Municipal and General Employees which makes up more than a third of all members. LO is affiliated to the ITUC and the ETUC. Gerd Kristiansen was elected leader on 6 May 2013 for a four-year period.
Document 11: Norse Federation: The Norse Federation (Norwegian: "Nordmanns-Forbundet" ) is a Norwegian non-profit organization that was founded it 1907, and is under the patronage of the monarch of Norway, currently King Harald V. The organization states that its purpose is to "unit[e] friends of Norway throughout the world". s of 2010 , the organization has approximately 3500 members. It publishes a periodical which is named "The Norseman".
Document 12: Dag Hareide: Dag Hareide (born 24 February 1949) is an organizational leader and author. He was knighted in the First Order of St. Olav by the King of Norway in 2015 for exceptional engagement in social innovation in civil society. He has been director of Rainforest Foundation Norway (2012 - 2015), one of the largest rainforest organizations in the world, Director of Nansen Academy Norway, the Norwegian Humanistic Academy which included the Nansen Center for Peace and Dialogue (2006 - 2012) and of other folk high schools, Chair of Nordic Forum for Mediation and Conflict Management (2002–2006) which gathered conflict mediators from the five Nordic countries. Curriculum developer in conflict management at the Norwegian Police University College, General Secretary of Oslo City Mission, a comprehensive diaconical institution, Chair of the Namibia Association of Norway, which was a leading NGO in Europe in support for SWAPO, the liberation movement for Namibia. Rehabilitation Coordinator for United Nations Emergency Office during the famine in Ethiopia (1985–1988) and returned later to coordinate and write the first five-year National Disaster Preparedness Plan in Ethiopia for the Ethiopian Government (1996–1998) General secretary of Friends of the Earth Norway, the largest environmental organization in Norway (1990–1995). He has also workes as journalist, pastor, teacher at high schools and University Colleges, initiated several campaigns and associations working for solidarity, dialogue and protection of the environment. He served as vice chair of the National Value Commission (Verdikommisjonen) which was formed by the Norwegian Prime Minister, and member of the Commission that formulated the objectives for the Norwegian School system (Bostadutvalget) https://www.gd.no/nyheter/lager-ny-formalsparagraf-i-skolen/s/1-934610-2342653. He chaired the first official dialogue between all faith and life stand communities in Norway. He has a Doctorate in Sociology (Magistergrad) from University of Oslo on the topic of vulnerability and preparedness in famine, and studies in religion, intellectual history, mass media, agriculture and statistics from different Universities and University Colleges in US and Norway.
Document 13: Harald V of Norway: Harald V (] ; born 21 February 1937) is the King of Norway, having ascended the throne following the death of his father on 17 January 1991.
Document 14: Prince Harald of Denmark: Prince Harald of Denmark ("Harald Christian Frederik"; 8 October 1876 - 30 March 1949) was a member of the Danish Royal Family. He was the third son of Frederick VIII of Denmark and his wife, Lovisa of Sweden, and thus brother to Christian X of Denmark.
Document 15: Ole Andreas Halvorsen: Ole Andreas Halvorsen (born 1961) is a Norwegian-born investor, hedge fund manager, and philanthropist. He is the CEO and a co-founder of the Connecticut-based hedge fund, Viking Global Investors. Viking had $16.7 billion under management as of April 2012. Halvorsen has consistently ranked among the top earning hedge fund managers, placing 11th in Forbes' 2012 rankings and 9th in 2015, according to Institutional Investor's Alpha.
ground_truth: 17 January 1991