Question: The world's largest global airline alliances in which United is a founding member was founded when?

Context paragraphs:
World Evangelical Alliance: The World Evangelical Alliance (WEA) is a global organization of evangelical Christian churches, serving more than 600 million evangelicals, founded in 1846 in London, England to unite evangelicals worldwide.  WEA is the largest international organization of evangelical churches, and is now headquartered in New York City, United States.  It brings together 7 regional and 129 evangelical alliances of churches, and over 150 member organizations.  Some of the national alliances include Protestant churches which are not traditional Evangelical churches in the strict sense (anabaptism), (Networks & Church Denominations).  Moreover, the WEA includes a certain percentage of individual evangelical Christian churches.  It is open for membership of individual evangelical Christians (as compared to the World Council of Churches (WCC), where individual membership is not possible).  The Evangelical Alliance of Great Britain, its founding member, is part of WEA.

United Continental Holdings: United Continental Holdings, Inc. (formerly UAL Corporation) is a publicly traded airline holding company headquartered in the Willis Tower in Chicago.  UCH owns and operates United Airlines, Inc.  The company is the successor of UAL Corporation, which agreed to change its name to United Continental Holdings in May 2010, when a merger agreement was reached between United and Continental Airlines.  Its stock trades under the UAL symbol.  To effect the merger, Continental shareholders received 1.05 shares of UAL stock for each Continental share, effectively meaning Continental was acquired by UAL Corporation; at the time of closing, it was estimated that United shareholders owned 55% of the merged entity and Continental shareholders owned 45%.  The company or its subsidiary airlines also have several other subsidiaries.  Once completely combined, United became the world's largest airline, as measured by revenue passenger miles. United is a founding member of the Star Alliance.

Round-the-world ticket: A round-the-world ticket (also known as round-the-world fare or RTW ticket in short) is a product that enables travellers to fly around the world for a relatively low price.  RTW tickets have existed for some time and in the past were generally offered through marketing agreements between airlines on several continents.  Now, they are almost universally offered by airline alliances such as SkyTeam, Star Alliance and Oneworld, or else by specialist travel agencies that will spend time helping customize a trip to the consumer's needs.  Prices vary but are generally in the range of 3000–5000 USD for an economy-class ticket.  Sometimes, depending on airline and stops, it can be as low as 1171 GBP (~ 1829.57 USD).  An alternative for a round-the-world ticket is a continent pass.

Pan American World Airways: Pan American World Airways, known from its founding until 1950 as Pan American Airways and commonly known as Pan Am, was the principal and largest international air carrier in the United States from 1927 until its collapse on December 4, 1991.  Founded in 1927 as a scheduled air mail and passenger service operating between Key West, Florida, and Havana, Cuba, the airline became a major company credited with many innovations that shaped the international airline industry, including the widespread use of jet aircraft, jumbo jets, and computerized reservation systems.  It was also a founding member of the International Air Transport Association (IATA), the global airline industry association.  Identified by its blue globe logo ("The Blue Meatball"), the use of the word "Clipper" in aircraft names and call signs, and the white pilot uniform caps, the airline was a cultural icon of the 20th century.  In an era dominated by flag carriers that were wholly or majority government-owned, it was also the unofficial overseas flag carrier of the United States.  During most of the jet era, Pan Am's flagship terminal was the Worldport located at John F. Kennedy International Airport in New York City.

SkyTeam: SkyTeam is an airline alliance.  Founded in June 2000, SkyTeam was the last of the three major airline alliances to be formed, the first two being Star Alliance and Oneworld.  s of 2014 , SkyTeam consists of 20 carriers from five continents and operates with the slogan "Caring more about you".  It also operates a cargo alliance named SkyTeam Cargo, which partners ten carriers, all of them SkyTeam members.  Its centralised management team, "SkyTeam Central", is based at the World Trade Center Schiphol Airport on the grounds of Amsterdam Airport Schiphol in Haarlemmermeer, Netherlands.

History of Kingfisher Airlines: Kingfisher Airlines was established in 2003.  It is owned by the Bengaluru based United Breweries Group.  The airline started commercial operations on 9 May 2005 with a fleet of four new Airbus A320-200s operating a flight from Mumbai to Delhi.  It started its international operations on 3 September 2008 by connecting Bengaluru with London.  Kingfisher's head office is located in Kingfisher House Western Express Highway Vile Parle (E) Mumbai – 400099 India and its registered office is located in UB City, Bangalore.  Its head office was previously in the Kingfisher House in Vile Parle (East), Mumbai.  In 2012 Vijay Mallya was trying to sell the Vile Parle Kingfisher House.  The airline had shut down its operations when on 20 October 2012 the DGCA suspended its flying license.  This suspension had been due to failure to give an effective response to the show-cause notice issued by DGCA.  However, The airline had locked out its employees for several days before this suspension.  On 25 October 2012, the employees agreed to return to work.  On 7 June 2010 Kingfisher became a member elect of the Oneworld airline alliance when it signed a formal membership agreement.  Kingfisher confirmed on 20 December 2011 that it will join the Oneworld airline alliance on 10 February 2012.  Kingfisher would have been the first Indian carrier to join one of the big airline alliances.  However, on 3 February 2012, owing to bad financial situation and two days after the International Air Transport Association (IATA) clearing house suspended Kingfisher Airlines; the airlines participation to Oneworld has been put on hold.

Air France: Air France (] ; formally "Société Air France, S.A."), stylized as AIRFRANCE, is the French flag carrier headquartered in Tremblay-en-France.  It is a subsidiary of the Air France–KLM Group and a founding member of the SkyTeam global airline alliance.  As of 2013 Air France serves 36 destinations in France and operates worldwide scheduled passenger and cargo services to 168 destinations in 93 countries (including overseas departments and territories of France) and also carried 46,803,000 passengers in 2015.  The airline's global hub is at Charles de Gaulle Airport with Orly Airport.  Air France's corporate headquarters, previously in Montparnasse, Paris, are located on the grounds of Charles de Gaulle Airport, north of Paris.

Oneworld: Oneworld (marketed as oneworld; CRS: *O) is an airline alliance founded on 1 February 1999.  The alliance's stated objective is to be the first-choice airline alliance for the world's frequent international travelers.  Its central alliance office is currently based in New York City in the United States.  Its member airlines include Air Berlin, American Airlines, British Airways, Cathay Pacific, Finnair, Iberia, Japan Airlines, LATAM Airlines, Malaysia Airlines, Qantas, Qatar Airways, Royal Jordanian, S7 Airlines and SriLankan Airlines, plus some 21 affiliated airlines.  As of August 2016, Oneworld is the third largest global alliance in terms of passengers with more than 557.4 million passengers carried, behind Star Alliance (689.98 M) and SkyTeam (665.4 M).  Its slogan is "An alliance of the world's leading airlines working as one."

Star Alliance: Star Alliance is one of the world's largest global airline alliances. Founded on 14 May 1997, its current CEO is Jeffrey Goh and its headquarters is located in Frankfurt am Main, Germany.  s of November 2016 , Star Alliance is the largest global alliance by passenger count with 689.98 million, ahead of SkyTeam (665.4 million) and Oneworld (557.4 million).  Its slogan is "The Way The Earth Connects".

Hollis L. Harris: Hollis Loyd Harris (November 25, 1931 – July 13, 2016) served as President and COO of Delta Air Lines (1987-1990) and Chairman, President, and CEO of Continental Airlines (1990-1991), Air Canada (1992-1996), and World Airways (1999-2004).  According to author Harry Nolan, Harris led the latter three airlines "out of the turbulence of financial instability toward profitability."  In 1997 Harris and Steve Wolf signed a strategic agreement between Air Canada and United Airlines, producing what is now the Star Alliance, which grew to become the world's largest global airline alliance.

Supporting paragraphs: United Continental Holdings Star Alliance
Answer: 14 May 1997