The One O'Clock Lab Band is the highest level of nine big bands (see also Two O'Clock Lab Band) of the Jazz Studies Division at the University of North Texas College of Music, a comprehensive music school with the largest enrollment of any music institution accredited by the National Association of Schools of Music, and the oldest (and first) in the world offering a degree in jazz studies.

The band has performed and toured abroad in Australia, Canada, England, Finland, France, Germany, Hong Kong, Italy, Japan, Mexico, Norway, Poland, Portugal, Russia, Switzerland, Thailand, and The Netherlands. Since the 1970s, the band’s albums have received six Grammy nominations, including two for Lab 2009. Since 2008, the One O’Clock has been performing under the direction of Steve Wiest (born 1957), a two-time Grammy-nominated composer-arranger and Associate Professor of Music.