What is she green day?

Green Day is an American punk rock band formed in 1986 by lead vocalist and guitarist Billie Joe Armstrong and bassist Mike Dirnt. The band has been credited with reviving the popularity of punk rock in the United States during the mid-1990s. The band's fifth album, "Dookie," released in 1994, became a massive commercial success, selling over 20 million copies worldwide.

Green Day's music has been noted for its political and social commentary, particularly on issues such as war, American society, and the environment. The band has won five Grammy Awards and has sold over 75 million records worldwide, making them one of the best-selling music artists of all time.

Some of Green Day's most popular songs include "Good Riddance (Time of Your Life)," "American Idiot," "When I Come Around," and "Basket Case." In addition to their music, Green Day has also been involved in various philanthropic and social causes, including promoting clean energy and supporting LGBTQ+ rights.