No verified creator or founding record has been identified for National Read a Book Day. It appears to have emerged organically in the United States in the late 2000s as an informal encouragement to read, and was widely recognized by the mid-2010s.
An older, documented neighbor
The calendar already held a reading day with a clear birth certificate. UNESCO declared International Literacy Day in 1966, and it has been observed every September 8 since 1967. That day sits two squares away from this one, fully sourced where National Read a Book Day is blank. The contrast is the point: one observance was built by an institution, the other by readers passing it along.



