Public Domain Day, which falls on January 1st, is intended to be a celebration of copyright expiration, a day when notable works enter the public domain. In 2014, Public Domain Day in Canada saw the writings of Robert Frost, W.E.B. Du Bois, C.S. Lewis, Sylvia Plath, and Aldous Huxley became public works, free for anyone to use and build upon. However, because of copyright extensions passed by the U.S. Congress, no published works entered the U.S. public domain in 2014, and nothing will until 2019.