Question: When was it announced that Everton was fixed to play in the Premier League's 26th season?

Context paragraphs:
2012–13 Everton F.C. season: The 2012–13 season was Everton's 21st season in the Premier League and 59th consecutive season in the top division of English football.  It is also Everton's 114th season of league football and 116th season in all competitions.  Having finished in seventh position in the domestic league in the previous season, Everton missed out on competing in any European competitions for the third season running.

2013–14 Everton F.C. season: The 2013–14 season was Everton's 22nd season in the Premier League and 60th consecutive season in the top division of English football.  It was also Everton's 115th season of league football and 117th season in all competitions.  It was the first season without David Moyes as manager since 2002, with Moyes leaving Everton to succeed Alex Ferguson as manager of Manchester United.  In addition, the club crest was redesigned ahead of this season for the first time since 2000.  On 5 June 2013, Roberto Martínez was announced as the new Everton manager, having left his post at relegated FA Cup holders Wigan Athletic.  Everton finished in sixth position in the domestic league in the previous season, missing out on qualification for the UEFA Europa League, meaning it failed to qualify for any European competitions for the fourth season running.

2017–18 Everton F.C. season: The 2017–18 season is Everton's 64th consecutive season in the top flight of English football and their 140th year in existence.  They will participate in the Premier League, FA Cup, EFL Cup, and UEFA Europa League.

2010–11 Everton F.C. season: The 2010–11 season of Everton F.C. was Everton's 19th season in the Premier League and 57th consecutive season in the top division of English football.  It was also Everton's 112th season of league football and 114th season in all competitions.  The club began their pre-season friendly schedule on 10 July 2010 with a 3-match tour of Australia.  Also, for the first time in club history, Everton played against and defeated their namesake, Chilean club Everton de Viña del Mar, 2–0 in a friendly at Goodison Park.  The club entered the Football League Cup in the Second Round against Huddersfield Town and were knocked out in the subsequent round in an upset defeat away to Brentford.  Everton entered the FA Cup in the Third Round Proper and were eliminated in the Fifth Round by Reading.  The club's Premier League campaign began on 14 August against Blackburn Rovers at Ewood Park and concluded on 22 May against Chelsea at Goodison Park.  For the first time since 2006–07, Everton did not participate in any European competitions.

2017–18 Russian Premier League: The 2017–18 Russian Premier League will be the 26th season of the premier league football competition in Russia since the dissolution of the Soviet Union and the 15th under the current Russian Premier League name.  Spartak Moscow came into the season as the defending champions of the 2016–17 season.

2014–15 Everton F.C. season: The 2014–15 season was Everton's 23rd season in the Premier League and 61st consecutive season in the top division of English football.  It is also Everton's 115th season of league football and 118th season in all competitions.  The club finished fifth in the previous campaign to qualify for the Europa League, which saw Everton play in Europe for the first time since the 2009–10 season.  On 30 July 2014, the club signed Chelsea striker Romelu Lukaku for a club record £28 million.

2017–18 Premier League: The 2017–18 Premier League is the 26th season of the Premier League, the top English professional league for association football clubs, since its establishment in 1992.  The season started on 11 August 2017 and is scheduled to finish on 13 May 2018.  Fixtures for the 2017–18 season were announced on 14 June 2017.

2011–12 Everton F.C. season: The 2011–12 season of Everton F.C. was the club's 20th season in the Premier League and 58th consecutive season in the top division of English football.  It was also Everton's 113th season of league football and 115th season in all competitions.  The club entered the League Cup in the second round and were knocked out in the fourth round following a 1–2 home defeat to Chelsea.  The club entered the FA Cup in the third round and advanced all the way to the semi-finals where they faced rivals Liverpool, at Wembley, for the first time since 1989.  Everton's run ensured they stretched their number of quarter-final appearances in the competition to 41, which is a record.  Despite taking the lead in the semi-final, Everton lost the game 1–2.

2011–12 Premier League: The 2011–12 Premier League (known as the Barclays Premier League due to its sponsorship by the Barclays bank) was the 20th season of the Premier League since its establishment in 1992.  The season began on 13 August 2011 and ended on 13 May 2012 with Manchester City sealing their first league title since 1968 with victory over Queens Park Rangers on the final day.  The title was City's first Premier League success, making them the fifth club to win the Premier League in its 20-year history.  City finished level on 89 points with Manchester United, but their goal difference was eight better than their local rivals', making it the first time the Premier League had been won on goal difference and the first time a club previously relegated from the Premier League had won the title.

2009–10 Everton F.C. season: The 2009–10 season of Everton F.C. was Everton's 18th season in the Premier League and 56th consecutive season in the top division of English football.  The club began their preseason friendly schedule on 10 July 2009 and concluded the summer friendlies on 7 August.  Everton began their Premier League season at home in Goodison Park with a 6–1 defeat by Arsenal, the worst defeat by the North London side since a 7–0 loss in 2005.  Everton's poor form continued throughout most of the first half of the season; they found themselves in 16th place, only two points clear of the relegation zone, at Christmas, though their league form improved significantly from that time.  Everton entered the League Cup in the Third Round against Hull City, a match they won, but the club was eliminated in the next round by Tottenham Hotspur.  They also entered the FA Cup in the Third Round Proper and were eliminated in the Fourth Round by Birmingham City.

Supporting paragraphs: 2017–18 Everton F.C. season 2017–18 Premier League
Answer: 14 June 2017