The regular season starts in late October and ends in the middle of April.
American Basketball Association ended in 1976.
Global Basketball Association ended in 1992.
Basketball Association of America ended in 1949.
Continental Basketball Association ended in 2001.
Basketball Association of the Philippines ended in 2007.
National-Social Association ended in 1903.
National Hockey Association ended in 1918.
National Graphical Association ended in 1990.
National Association of Operative Plasterers ended in 1968.
Free-minded National Association ended in 1934.
National Association for the Protection of Labour ended in 1832.
National Stock Car Racing Association ended in 1951.