Random Acts of Kindness Day is the name of an unofficial holiday increasingly celebrated around the world by localities or organizations, or nationwide, in order to encourage acts of kindness. The original founder of Random Acts of Kindness Day is unknown.^{[citation needed]}.

The holiday is celebrated annually in the United States on February 17 and in New Zealand on September 1.^[1] In New Zealand, RAK day began at a national level in 2005^[2] by Josh de Jong, Marshall Gray, Megan Singleton and Reuben Gwyn. It is not a holiday, rather a national day where the entire country is challenged to do something kind to a friend or stranger for no reason at all.