<Table> <Tr> <Th_colspan="2"> Minnesota Vikings </Th> </Tr> <Tr> <Td_colspan="2"> Current season </Td> </Tr> <Tr> <Td_colspan="2"> Established January 28, 1960; 57 years ago (January 28, 1960) First season: 1961 Play in U.S. Bank Stadium Minneapolis, Minnesota Headquartered at Winter Park Eden Prairie, Minnesota </Td> </Tr> <Tr> <Th_colspan="2"> </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Logo </Td> <Td> Wordmark </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> League / conference affiliations </Th> </Tr> <Tr> <Td_colspan="2"> <P> National Football League (1961--present) </P> <Ul> <Li> Western Conference (1961--1969) <Ul> <Li> Central Division (1967--1969) </Li> </Ul> </Li> <Li> National Football Conference (1970--present) <Ul> <Li> NFC Central (1970--2001) </Li> <Li> NFC North (2002--present) </Li> </Ul> </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> Current uniform </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Team colors </Th> <Td> <P> Purple, Gold, White </P> </Td> </Tr> <Tr> <Th> Fight song </Th> <Td> Skol, Vikings </Td> </Tr> <Tr> <Th> Mascot </Th> <Td> Viktor the Viking </Td> </Tr> <Tr> <Th_colspan="2"> Personnel </Th> </Tr> <Tr> <Th> Owner (s) </Th> <Td> Zygi Wilf </Td> </Tr> <Tr> <Th> Chairman </Th> <Td> Zygi Wilf </Td> </Tr> <Tr> <Th> President </Th> <Td> Mark Wilf </Td> </Tr> <Tr> <Th> General manager </Th> <Td> Rick Spielman </Td> </Tr> <Tr> <Th> Head coach </Th> <Td> Mike Zimmer </Td> </Tr> <Tr> <Th_colspan="2"> Team history </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Minnesota Vikings (1961--present) </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Team nicknames </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> The Vikes, The Purple People Eaters, The Purple and Gold </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Championships </Th> </Tr> <Tr> <Td_colspan="2"> <P> League championships (0 †) </P> <Ul> <Li> NFL Championships (pre-1970 AFL--NFL merger) (1) 1969 </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> <P> Conference championships (4) </P> <Ul> <Li> NFL Western: 1969 </Li> <Li> NFC: 1973, 1974, 1976 </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> <P> Division championships (19) </P> <Ul> <Li> NFL Central: 1968, 1969 </Li> <Li> NFC Central: 1970, 1971, 1973, 1974, 1975, 1976, 1977, 1978, 1980, 1989, 1992, 1994, 1998, 2000 </Li> <Li> NFC North: 2008, 2009, 2015 </Li> </Ul> †--Does not include the AFL or NFL championships won during the same seasons as the AFL--NFL Super Bowl championships before the 1970 AFL--NFL merger </Td> </Tr> <Tr> <Th_colspan="2"> Playoff appearances (28) </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> NFL: 1968, 1969, 1970, 1971, 1973, 1974, 1975, 1976, 1977, 1978, 1980, 1982, 1987, 1988, 1989, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2004, 2008, 2009, 2012, 2015 </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Home fields </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Metropolitan Stadium (1961--1981) </Li> <Li> Mall of America Field at Hubert H. Humphrey Metrodome (1982--2013) </Li> <Li> TCF Bank Stadium (2014--2015) </Li> <Li> U.S. Bank Stadium (2016--present) </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Minnesota Vikings </Th> </Tr>

When did the minnesota vikings become a football team