No founder, establishing act, proclamation or formal record of when National Kathleen Day began has been identified. It circulates through online holiday listings, and that circulation is the only documented trace of the observance.
The Indiana schoolteacher and the answer song
In 1875 an American wrote the other famous Kathleen song. The University of Pittsburgh's Voices Across Time describes Thomas Westendorf as "a teacher in an Indiana reform school and an amateur composer and musician".
The usual story is that he wrote "I'll Take You Home Again, Kathleen" for his wife. Voices Across Time calls that incorrect: the song answered "Barney, Take Me Home Again" by the composer George W. Persley.
It was the only song by Westendorf that achieved a significant amount of popularity. Publishers then were not obligated to pay royalties, and his small monthly income came through the publisher's gratitude.


