Title: 2011 New York Giants season
Content:  Giants became the first NFC East Division champion to win the Super Bowl since the Dallas Cowboys in 1995 (the Giants were a Wild Card team when they won Super Bowl XLII). The Giants were also close to rematching the Baltimore Ravens in the Super Bowl for the first time since 2000. The 2011 Giants were an aberration from other great Giants teams of the past who were built around tough, physical defensive play and an offense built around a power running attack. Despite Jason Pierre-Paul having a breakout Pro Bowl season with 16.5 sacks, the defense was ranked in the bottom 
Title: 2012 New York Giants season
Content:  The  New York Giants season was the franchise's 88th season in the National Football League, the ninth under head coach Tom Coughlin and the third playing their home games at MetLife Stadium in East Rutherford, New Jersey. The Giants began the 2012 season as defending Super Bowl Champions for the fourth time in their history, by virtue of their 21–17 victory in Super Bowl XLVI over the New England Patriots, their second Super Bowl victory over the Patriots. The Giants finished 9–7 for the second straight year, but failed to make the playoffs. The 2012 Giants were also the first defending Super Bowl champion to miss the playoffs since the 2009 Steelers. This was the last season the Giants had a winning record until 2016.
Title: 1991 New York Giants season
Content:  The  New York Giants season was the franchise's 67th season in the National Football League. The Giants entered the season as the defending Super Bowl champion but failed to qualify for the playoffs. They were the eighth team in NFL history to enter a season as the defending Super Bowl champion and miss the playoffs, and became the first organization in NFL history to do so twice (the Giants missed out on the playoffs a season after winning Super Bowl XXI as well). The 1991 season marked the first season that the Mara family did not have total ownership of the Giants. Wellington Mara's nephew Tim, who had inherited the half-stake in the team that his grandfather and namesake had 
Title: 2011 New York Giants season
Content:  Some news organizations, among them The St. Louis Post-Dispatch, said that the Giants' victory in the Super Bowl made them the NFL's version of the 2011 World Series champion St. Louis Cardinals, saying that these two championship teams that had been given the last rites by many near the end of the season, emerged as champions at the end. This season was the last time the Giants qualified for the playoffs under Coughlin, and would not reach the playoffs again until the 2016 season. To date, 2011 is the last time the Giants have won the NFC East and a playoff game.
Title: 1987 New York Giants season
Content:  The  New York Giants season was the franchise's 63rd season in the National Football League and their fifth under head coach Bill Parcells. The Giants entered the season as the defending Super Bowl champion but failed to qualify for the playoffs. They were the sixth team in NFL history to enter a season as the defending Super Bowl champion and miss the playoffs. The Giants started the season 0–5, becoming the first defending Super Bowl champion to lose their first 5 games. Ultimately, the Giants never recovered from their 0–5 start and failed to improve on their 14–2 record from 1986 and finished at 6–9. They were eliminated from playoff contention for the first time since 1983. They also placed last in their division for the first time since that same season.
Title: Super Bowl XLII
Content:  three postseason games. Punter Jeff Feagles played in his first Super Bowl after 20 years in the NFL. This was also the last game for Giants athletic trainer John Johnson who had been with the team for 60 years. The Giants became only the fourth team to win the Super Bowl without playing a single home game in the preceding playoffs. They joined the Green Bay Packers (who won Super Bowl I against the Kansas City Chiefs), the Kansas City Chiefs (who won Super Bowl IV against the Minnesota Vikings) and the Pittsburgh Steelers (who won Super Bowl XL against the Seattle Seahawks) 
Title: New York Giants
Content:  The Giants have won four Super Bowls, tied with Green Bay for the fifth most behind Dallas, San Francisco (both with 5), and New England and Pittsburgh (6 each).
Title: Super Bowl XXVI
Content:  and Joe Gibbs the first coach, to win a Super Bowl with three different quarterbacks. Two other teams have since duplicated this feat: the New York Giants (Phil Simms in Super Bowl XXI, Jeff Hostetler in Super Bowl XXV, and Eli Manning in Super Bowls XLII and XLVI) and the Green Bay Packers (Bart Starr in the first two Super Bowls, Brett Favre in Super Bowl XXXI, and Aaron Rodgers in Super Bowl XLV). This was the last major professional championship won by a D.C.-based team until the Capitals won the Stanley Cup in 2018. This was also the last game for Washington guard Russ Grimm.
Title: 1990 New York Giants season
Content:  The  New York Giants season was the franchise's 66th season in the National Football League. The Giants, who play in the National Football Conference (NFC) of the National Football League (NFL), won their sixth championship and second Super Bowl. Led by linebacker Lawrence Taylor and quarterbacks Phil Simms and Jeff Hostetler, the Giants posted a 13–3 record before defeating the Chicago Bears and the two-time defending Super Bowl champion San Francisco 49ers in the NFC playoffs. In Super Bowl XXV, they defeated the Buffalo Bills 20–19 in Tampa Stadium against a patriotic backdrop inspired by the recently started Gulf War. The story of the season is the subject of a recent book, 
Title: List of New York Giants seasons
Content:  1963 season, the franchise did not return to the playoffs until 1981, only finishing .500 or better five times during the postseason drought. Thirty years after the team's previous NFL title, the Giants were victorious in Super Bowl XXI, winning against the Denver Broncos 39–20 to end the 1986 season. The Giants won their second Super Bowl four years later, defeating the Buffalo Bills 20–19 in Super Bowl XXV. In the 2000 season, New York returned to the Super Bowl, but lost to the Baltimore Ravens 34–7. The 2007 season saw the Giants win their seventh NFL championship at Super Bowl XLII, 

Question: when was the last time giants won superbowl?
Answer: 2011.