From opensource.org, the first line of the license reads,Copyright <YEAR> <COPYRIGHT HOLDER>If the development goes across January 1, or a repository consists of sources written in different years, can I substitute something like 2013-2017 for <YEAR>?If I add sources to the repositories in later years, will I have to update each license of each repository every year, or will all licenses expire on midnight, Jan 1 if I don't?
Why do licenses such as the MIT License specify a single year?
mit;copyright;license file