From John Mark Ockerbloom of the Online Books page:
Much of the world gets to celebrate today as Public Domain Day as well, the day when a whole year’s worth of copyrights enter the public domain for anyone to copy or reuse as they like.
In countries that use the “life plus 50 years” minimum standard of the Berne Convention, works by authors who died in 1957 enter the public domain today. That includes writers, artists, and composers like Nikos Kazantzakis, Diego Rivera, Dorothy L. Sayers, Jean Sibelius, and Laura Ingalls Wilder.
In countries that use the “life plus 70 years” term, works by authors who died in 1937 enter the public domain, including works by J. M. Barrie, Jean de Brunhoff, H. P. Lovecraft, Maurice Ravel, and Edith Wharton. Since many countries with this term recently extended it due to trade agreements, they’re often seeing these works re-enter the public domain after being removed from it, but their return to the public is still appreciated.