Prolation Prolation Prolation is a term used in the theory of the mensural notation of medieval and Renaissance music to describe its rhythmic structure on a small scale, as opposed to "tempus", which described a larger scale. The term "prolation" is derived from the Latin "prolatio", first used by Philippe de Vitry in describing Ars Nova, a musical style that came about in 14th-century France. Prolation, together with tempus, corresponds roughly to the concept of time signature in modern music. Prolation describes whether a semibreve (whole note) is equal in length to two minims (half notes) ("minor prolation" or "imperfect prolation";
What Time Is It? (song) Efron) and Gabriella Montez (Vanessa Hudgens) is also visible. When the clock has ten seconds to go before the bell, the class commenced chanting "summer!" getting louder until the bell rings, after which the song is performed. The music video contains clips directly from the movie, and was released on July 31, 2007 on the iTunes Store. The music video was also released on the Disney Channel. The song peaked at number 1 on the "Billboard" Hot Single Sales chart for 28 weeks, which became the highest selling single of the year-end chart in 2007. What Time Is It? (song)