<Li> most products, in most contexts, tend to be built to the design revision that was the latest one at the time of building . </Li> <P> Alfred P. Sloan extended the idea of yearly fashion - change from clothing to automobiles in the 1920s . His company, General Motors, was the first to introduce planned obsolescence (in cars) by means of making the production date, and thus the car's newness or lack of it, visually discernible . </P> <P> European and Japanese automakers can utilise the term "model year" in respect of model availability dates in North American markets: these often receive updated models significantly later than domestic markets, especially in the event of unforeseen slow sales causing an inventory build - up of earlier versions . </P> <P> The practice of identifying revisions of automobiles by their model year is strongest in Canada and the United States . Typically, complete vehicle redesigns of long - standing models occur in cycles of at least five years, with one or two facelifts during the model cycle, and manufacturers introduce such redesigns at various times throughout a calendar year . </P>

When do new model year trucks come out