"This Land Is Your Land" is one of the United States' most famous folk songs, written by Woody Guthrie in 1940. It was originally written in response to Irving Berlin's "God Bless America". Guthrie considered that song unrealistic and complacent, and was tired of hearing Kate Smith sing it on the radio, so he wrote a different song, originally called "God Blessed America for Me". Guthrie varied the lyrics over time, sometimes including more overtly political verses that often do not appear in recordings or publications.
The author died in 1967, so this work is also in the public domain in countries and areas where the copyright term is the author's life plus 50 years or less. This work may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
Works published in 1945 would have had to renew their copyright in either 1972 or 1973, i.e. at least 27 years after it was first published / registered but not later than in the 28th year. As it was not renewed, it entered the public domain on .