Title: History of the New York City Subway
Content:   The New York City Subway is a rapid transit system that serves four of the five boroughs of New York City, New York: the Bronx, Brooklyn, Manhattan, and Queens. Its operator is the New York City Transit Authority (NYCTA), which is controlled by the Metropolitan Transportation Authority (MTA) of New York. In 2016, an average of 5.66 million passengers used the system daily, making it the busiest rapid transit system in the United States and the seventh busiest in the world. The first underground line opened on October 27, 1904, almost 35 years after the opening of the first elevated line in New York City, which became the IRT Ninth Avenue Line. By the time the 
Title: Early history of the IRT subway
Content: The IRT Eastern Parkway Line from Atlantic Avenue–Barclays Center to Borough Hall ; The IRT Lexington Avenue Line from Borough Hall to Grand Central–42nd Street ; The IRT 42nd Street Shuttle from Grand Central–42nd Street to Times Square ; The IRT Broadway–Seventh Avenue Line from Times Square to Van Cortlandt Park–242nd Street ; The IRT Lenox Avenue Line from 96th Street to 145th Street ; The IRT White Plains Road Line from 142nd Street Junction to 180th Street–Bronx Park The first regularly operated subway in New York City was opened on October 27, 1904, and was operated by the Interborough Rapid Transit Company (IRT). The early IRT system consisted of a single trunk line below 96th Street in Manhattan, with three northern branches in Upper Manhattan and the Bronx, and a southern branch to Brooklyn. The system had four tracks between Brooklyn Bridge–City Hall and 96th Street, allowing 
Title: New York City Subway
Content:  The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, an affiliate agency of the state-run Metropolitan Transportation Authority (MTA). Opened on October 27, 1904, the New York City Subway is one of the world's oldest public transit systems, one of the most-used, and the one with the most stations, with 472 stations in operation (424 if stations connected by transfers are counted as single stations). Stations are located throughout the boroughs of Manhattan, Brooklyn, Queens, and the Bronx. The system has operated 24/7 
Title: New York City Subway
Content:  first underground line of the subway opened on October 27, 1904, built by the Interborough Rapid Transit Company (IRT) almost 36 years after the opening of the first elevated line in New York City (which became the IRT Ninth Avenue Line). The 9.1 mi subway line, then called the "Manhattan Main Line", ran from City Hall station northward under Lafayette Street (then named Elm Street) and Park Avenue (then named Fourth Avenue) before turning westward at 42nd Street. It then curved northward again at Times Square, continuing under Broadway before terminating at 145th Street station in Harlem. Its operation was leased to the Interborough Rapid 
Title: 157th Street station
Content:  Operation of the first subway began on October 27, 1904, with the opening of the original 28 stations of the New York City Subway from City Hall to 145th Street on the West Side Branch. Two days later, service was extended one stop to 157th Street, which at the time was still incomplete. The station had been soft opened to allow passengers to travel to the Yale–Columbia football game at the Polo Grounds. 157th Street was formally opened on November 12, 1904, as the first extension to the subway. The station's opening had been delayed by two weeks because there was 
Title: History of the New York City Subway
Content:  As the first line neared completion, New York City offered it for private operation as a formality, knowing that no operator would meet its terms. Thus the city declared that it would operate it itself, formalizing a foregone conclusion. The first line opened without a formal ceremony. The trains began operating their regular schedules ahead of time, and all stations of the Eighth Avenue Line, from 207th Street in Inwood to Hudson Terminal (now World Trade Center), opened simultaneously at one minute after midnight on September 10, 1932. On January 1, 1936, a second trunk line—the Sixth Avenue Line—opened from West Fourth Street (where it splits from the Eighth Avenue Line) to East Broadway. The new subway line's 
Title: Times Square–42nd Street/Port Authority Bus Terminal station
Content:  Planning for a subway line in New York City dates to 1864. However, development of what would become the city's first subway line did not start until 1894, when the New York State Legislature authorized the Rapid Transit Act. The subway plans were drawn up by a team of engineers led by William Barclay Parsons, chief engineer of the Rapid Transit Commission. It called for a subway line from New York City Hall in lower Manhattan to the Upper West Side, where two branches would lead north into the Bronx. A plan was formally adopted in 1897, which called for the subway to run under several streets in 
Title: 72nd Street station (IRT Broadway–Seventh Avenue Line)
Content:  Planning for a subway line in New York City dates to 1864. However, development of what would become the city's first subway line did not start until 1894, when the New York State Legislature authorized the Rapid Transit Act. The subway plans were drawn up by a team of engineers led by William Barclay Parsons, chief engineer of the Rapid Transit Commission. It called for a subway line from New York City Hall in lower Manhattan to the Upper West Side, where two branches would lead north into the Bronx. A plan was formally adopted in 1897, and all legal conflicts concerning the route alignment were resolved near the end of 1899. The Rapid Transit Construction Company, organized by John B. McDonald and funded by August Belmont Jr., signed the initial Contract 1 with the Rapid Transit Commission in February 1900, in which it would 
Title: Cathedral Parkway–110th Street station (IRT Broadway–Seventh Avenue Line)
Content:  Planning for a subway line in New York City dates to 1864. However, development of what would become the city's first subway line did not start until 1894, when the New York State Legislature authorized the Rapid Transit Act. The subway plans were drawn up by a team of engineers led by William Barclay Parsons, chief engineer of the Rapid Transit Commission. It called for a subway line from New York City Hall in lower Manhattan to the Upper West Side, where two branches would lead north into the Bronx. A plan was formally adopted in 1897, and all legal conflicts concerning the route alignment were resolved near the end of 1899. The Rapid Transit Construction Company, organized by John 
Title: 137th Street–City College station
Content:  Planning for a subway line in New York City dates to 1864. However, development of what would become the city's first subway line did not start until 1894, when the New York State Legislature authorized the Rapid Transit Act. The subway plans were drawn up by a team of engineers led by William Barclay Parsons, chief engineer of the Rapid Transit Commission. It called for a subway line from New York City Hall in lower Manhattan to the Upper West Side, where two branches would lead north into the Bronx. A plan was formally adopted in 1897, and all legal conflicts concerning the route alignment were resolved near the end of 

Question: when did the subway open in new york?
Answer: October 27, 1904.
1904.