paragraph_text: In quantum mechanics and quantum field theory, a Schrödinger field, named after Erwin Schrödinger, is a quantum field which obeys the Schrödinger equation. While any situation described by a Schrödinger field can also be described by a many-body Schrödinger equation for identical particles, the field theory is more suitable for situations where the particle number changes.

paragraph_text: The minimum age to purchase and consume varies, but the most common age is 18 years. However, in North America the age limits varies between 18 and 21 years of age. Throughout the United States the minimum legal age to purchase any alcoholic beverage from a shop, supermarket, liquor store, bar, club or any other licensed premises is 21 years of age. In Canada each province can decide which minimum age limit is to be set to buy or consume alcohol. Most provinces have a minimum age of 19 years, while Alberta, Manitoba and Quebec have set a minimum age of 18 years. In South America all countries have set a minimum purchase age of 18 years, except for Guyana where minors aged 16 or 17 may consume a glass of beer, wine or cider in a restaurant provided they buy a meal, and Paraguay the only country with a minimum legal purchase and drinking age of 20 years.

paragraph_text: The Rosen Publishing Group is an American publisher for educational books for readers from ages pre-Kindergarten through grade 12. It was founded in 1950 under the name "Richards Rosen Press" and is located in New York City. The company changed its name in 1982.

paragraph_text: 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.

paragraph_text: The minimum age to purchase and consume varies, but the most common age is 18 years. However in North America the age limits varies between 18 and 21 years of age. Throughout the United States the minimum legal age to purchase any alcoholic beverage from a shop, supermarket, liquor store, bar, club or any other licensed premises is 21 years of age. In Canada each province can decide which minimum age limit is to be set to buy or consume alcohol. Most provinces have a minimum age of 19 years, while Alberta, Manitoba and Quebec have set a minimum age of 18 years. In South America all countries have set a minimum purchase age of 18 years, except for Guyana where minors aged 16 or 17 may consume a glass of beer, wine or cider in a restaurant provided they buy a meal, and Paraguay the only country with a minimum legal purchase and drinking age of 20 years.

paragraph_text: 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.

paragraph_text: Carabao Dang Energy Drink (; ) "Khārābāw dæng" ("red water buffalo") is a Thai energy drink launched in 2002 by Carabao Tawandang Co Ltd. It is now Thailand's second most popular energy drink. It is the key brand of Carabao Tawandang in Thailand, with an estimated 21 percent market share in 2014.

paragraph_text: Alcohol laws of Australia regulate the sale and consumption of alcoholic beverages (If you are 18 and over in Australia you are allowed to vote, drink and drive). Legal age of drinking is 18.

paragraph_text: 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.

paragraph_text: New Jersey's drinking age was lowered to 18 in 1973 as part of a broader legal change which reduced New Jersey's age of majority from 21 to 18. Much of the impetus for lowering the drinking age to 18 was to grant returning Vietnam veterans the right to purchase alcohol. Possibly because of concerns about 18 - year - old high school students being able to legally purchase liquor, and then illegally consume it school, the state raised the drinking age to 19 in 1980. Citing statistics that indicated an increase in car deaths among drivers under 21, the drinking age was raised back to 21 in 1983. At the same time, the penalties for underage drinking were increased to include a mandatory driver's license suspension. In 1985, the state made it illegal for an adult to give alcohol to a person under 21, with exception for religious services and parents serving alcohol to their own children at home or in a private area.

paragraph_text: 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.

paragraph_text: 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.

paragraph_text: State Current legal drinking age Year adopted Previous legal drinking age New South Wales 18 1905 21 Queensland 18 21 South Australia 18 1971 21 to 20 in 1968 Tasmania 18 21 to 20 in 1967 Victoria 18 1906 10 Western Australia 18 1970 21 Australian Capital Territory 18 1928 Not amended Northern Territory 18 1929 Not amended

paragraph_text: The minimum drinking age in Pennsylvania is 21 years. Minors are prohibited from purchasing, possessing, or consuming alcohol, even if it is furnished by the minor's immediate family. Persons over the age of 18 are permitted to serve alcohol, so an exception is made in the possession portion of the law in this respect. Many states have exceptions for consuming alcohol made for religious or medicinal purposes, but Pennsylvania does not have exceptions for either.

paragraph_text: Although the minimum legal age to purchase alcohol is 21 in all states (see National Minimum Drinking Age Act), the legal details vary greatly. While a few states completely ban alcohol usage for people under 21, the majority have exceptions that permit consumption.

paragraph_text: Helfaer Field, in Milwaukee, Wisconsin, is a Little League baseball field located next to Miller Park, home of the Milwaukee Brewers.

paragraph_text: In law, a minor is a person under a certain age, usually the age of majority, which legally demarcates childhood from adulthood. The age of majority depends upon jurisdiction and application, but it is generally 18. Minor may also be used in contexts that are unconnected to the overall age of majority. For example, the drinking age in the United States is usually 21, and younger people are sometimes called minors in the context of alcohol law, even if they are at least 18. The term underage often refers to those under the age of majority, but it may also refer to persons under a certain age limit, such as the drinking age, smoking age, age of consent, marriageable age, driving age, voting age, etc. Such age limits are often different from the age of majority.

paragraph_text: The Pan American Hockey Stadium is a field hockey stadium located in Guadalajara, Mexico. It was officially opened by Mexican President Felipe Calderón on May 12, 2010. It has a capacity of 1,870 spectators, and hosted the field hockey competition at the 2011 Pan American Games. It is only the second, and by far the most modern, field hockey stadium built in the state of Jalisco despite the fact that 50% of the Mexican National field hockey team comes from the state. The facility also includes dedicated change rooms, massage, medical and rehabilitation facilities and will become a sports academy after the games.

paragraph_text: 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.

paragraph_text: 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.

Question: when did the drinking age change to 21 in the state where Helfaer Field is located?
Answer: September 1, 1986