Question: when did the drinking age change to 21 in the state where Helfaer Field is located?

full_context: Document 1: Alcohol laws of Wisconsin: The drinking age in Wisconsin is 21. Those under the legal drinking age may be served, possess, or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 - 20 may also be served, possess or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 to 20 may also possess (but not consume) alcohol as part of their employment.
Document 2: 1998 Milwaukee Brewers season: 1998 Milwaukee Brewers Major League affiliations National League (since 1998) Central Division (since 1998) Location Milwaukee County Stadium (since 1970) Milwaukee, Wisconsin (since 1970) Other information Owner (s) Bud Selig General manager (s) Sal Bando Manager (s) Phil Garner Local television WCGV - TV Wisconsin Sports Net (Matt Vasgersian, Bill Schroeder) Local radio WTMJ (AM) (Bob Uecker, Jim Powell) < Previous season Next season >
Document 3: Alcohol laws of New York: In response to the National Minimum Drinking Age Act in 1984, which reduced by up to 10% the federal highway funding of any state which did not have a minimum purchasing age of 21, the New York Legislature raised the drinking age from 19 to 21, effective December 1, 1985. (The drinking age had been 18 for many years before the first raise in 1984, to 19.) Persons under 21 are prohibited from purchasing alcohol or possessing alcohol with the intent to consume, unless the alcohol was given to that person by their parent or legal guardian. There is no law prohibiting where people under 21 may possess or consume alcohol that was given to them by their parents. Persons under 21 are prohibited from having a blood alcohol level of 0.02% or higher while driving.
Document 4: Coors Field: Coors Field is a baseball park located in downtown Denver, Colorado. It is the home field of the Colorado Rockies, the city's Major League Baseball (MLB) franchise. It is named for the Coors Brewing Company of Golden, Colorado, which purchased the naming rights to the park prior to its completion in 1995. The Rockies played their first two seasons, 1993 and 1994, in Mile High Stadium before moving to Coors Field, two blocks from Union Station in Denver's Lower Downtown neighborhood. The park includes 63 luxury suites and 4,526 club seats.
Document 5: McCormick Field: Lewis McCormick Field is a baseball stadium in Asheville, North Carolina. It is the home field of the Asheville Tourists minor league baseball team. As befits the hilly city of Asheville, the ballpark sits on a section of level ground partway up one of the city's hills, providing a picturesque atmosphere. It is the oldest minor-league park in regular use.
Document 6: Chicago Cubs: Located in Chicago's Lake View neighborhood, Wrigley Field sits on an irregular block bounded by Clark and Addison Streets and Waveland and Sheffield Avenues. The area surrounding the ballpark is typically referred to as Wrigleyville. There is a dense collection of sports bars and restaurants in the area, most with baseball inspired themes, including Sluggers, Murphy's Bleachers and The Cubby Bear. Many of the apartment buildings surrounding Wrigley Field on Waveland and Sheffield Avenues have built bleachers on their rooftops for fans to view games and other sell space for advertisement. One building on Sheffield Avenue has a sign atop its roof which says "Eamus Catuli!" which is Latin for "Let's Go Cubs!" and another chronicles the time since the last Division title, pennant, and World Series championship. The 02 denotes two years since the 2008 NL Central title, 65 years since the 1945 pennant and 102 years since the 1908 World Series championship. On game days, many residents rent out their yards and driveways to people looking for parking spots. The uniqueness of the neighborhood itself has ingrained itself into the culture of the Chicago Cubs as well as the Wrigleyville neighborhood, and has led to being used for concerts and other sporting events, such as the 2010 NHL Winter Classic between the Chicago Blackhawks and Detroit Red Wings, as well as a 2010 NCAA men's football game between the Northwestern Wildcats and Illinois Fighting Illini.
Document 7: Chicago Cubs: The former location in Mesa is actually the second HoHoKam Park; the first was built in 1976 as the spring-training home of the Oakland Athletics who left the park in 1979. Apart from HoHoKam Park and Sloan Park the Cubs also have another Mesa training facility called Fitch Park, this complex provides 25,000 square feet (2,300 m2) of team facilities, including major league clubhouse, four practice fields, one practice infield, enclosed batting tunnels, batting cages, a maintenance facility, and administrative offices for the Cubs.
Document 8: West Milwaukee, Wisconsin: West Milwaukee is a village in Milwaukee County, Wisconsin, United States, which is located in the center of the county approximately a mile south of Miller Park. The population was 4,206 at the 2010 census.
Document 9: U.S. history of alcohol minimum purchase age by state: From 1976 to 1983, several states voluntarily raised their purchase ages to 19 (or, less commonly, 20 or 21), in part to combat drunk driving fatalities. In 1984, Congress passed the National Minimum Drinking Age Act, which required states to raise their ages for purchase and public possession to 21 by October 1986 or lose 10% of their federal highway funds. By mid-1988, all 50 states and the District of Columbia had raised their purchase ages to 21 (but not Puerto Rico, Guam, or the Virgin Islands, see Additional Notes below). South Dakota and Wyoming were the final two states to comply with the age 21 mandate. The current drinking age of 21 remains a point of contention among many Americans, because of it being higher than the age of majority (18 in most states) and higher than the drinking ages of most other countries. The National Minimum Drinking Age Act is also seen as a congressional sidestep of the tenth amendment. Although debates have not been highly publicized, a few states have proposed legislation to lower their drinking age, while Guam has raised its drinking age to 21 in July 2010.
Document 10: Alcohol laws of New York: In response to the National Minimum Drinking Age Act in 1984, which reduced by up to 10% the federal highway funding of any state which did not have a minimum purchasing age of 21, the New York Legislature raised the drinking age from 19 to 21, effective December 1, 1985. (The drinking age had been 18 for many years before the first raise on December 4th, 1982, to 19.) Persons under 21 are prohibited from purchasing alcohol or possessing alcohol with the intent to consume, unless the alcohol was given to that person by their parent or legal guardian. There is no law prohibiting where people under 21 may possess or consume alcohol that was given to them by their parents. Persons under 21 are prohibited from having a blood alcohol level of 0.02% or higher while driving.
Document 11: Helfaer Field: Helfaer Field, in Milwaukee, Wisconsin, is a Little League baseball field located next to Miller Park, home of the Milwaukee Brewers.
Document 12: Alcohol laws of Wisconsin: The 1983 Wisconsin Act 74, effective July 1, 1984, created a drinking age of 19. Meeting in special session at the call of the governor, the legislature enacted 1985 Wisconsin Act 337, which raised the drinking age to 21 and brought the state into compliance with the NMDA (National Minimum Drinking Age) on September 1, 1986.
Document 13: Alcohol laws of Wisconsin: The drinking age in Wisconsin is 21. Those under the legal drinking age may be served, possess, or consume alcohol if they are with a parent, legal guardian, or spouse who is of legal drinking age. Those age 18 to 20 may also possess (but not consume) alcohol as part of their employment.
Document 14: Wrigley Field: In April and May the wind often comes off Lake Michigan (less than a mile to the east), which means a northeast wind ``blowing in ''to knock down potential home runs and turn them into outs. In the summer, however, or on any warm and breezy day, the wind often comes from the south and the southwest, which means the wind is`` blowing out'' and has the potential to turn normally harmless fly balls into home runs. A third variety is the cross-wind, which typically runs from the left field corner to the right field corner and causes all sorts of havoc. Depending on the direction of the wind, Wrigley can either be one of the friendliest parks in the major leagues for pitchers or among the worst. This makes Wrigley one of the most unpredictable parks in the Major Leagues.
Document 15: National Minimum Drinking Age Act: The National Minimum Drinking Age Act of 1984 (23 U.S.C. § 158) was passed by the United States Congress on July 17, 1984. It was a controversial bill that punished every state that allowed persons below 21 years to purchase and publicly possess alcoholic beverages by reducing its annual federal highway apportionment by 10 percent. The law was later amended, lowering the penalty to 8 percent from fiscal year 2012 and beyond.
ground_truth: September 1, 1986
sub_queries: What is the name of the state where Helfaer Field is located? Answer: Wisconsin
when did the drinking age change to 21 in Wisconsin Answer: September 1, 1986