April 09, 1931
[Released April 9, 1931. Dated April 8, 1931 ]
IT GIVES me much pleasure on this anniversary of Your Majesty's birth to send to you hearty congratulations and best wishes for a long and prosperous reign.
HERBERT HOOVER
[His Majesty Albert, King of the Belgians, Brussels]
Herbert Hoover, Message to Albert, King of the Belgians, on His Birthday. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/212024