December 17, 1932
ON THIS anniversary of Your Majesty's birth, I send my hearty greetings and best wishes for your continued happiness and well being.
HERBERT HOOVER
[His Majesty Alexander I, King of Yugoslavia, Belgrade, Yugoslavia]
Herbert Hoover, Message to King Alexander I of Yugoslavia Offering Birthday Greetings. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/207857