May 10, 1929
THE PRESIDENT. Well, I have one question today, and I am not quite in a position to make an adequate reply to it, so this is a famine day, I am sorry to say. I have nothing on my mind, and apparently you have nothing on yours very much. I am sorry I haven't anything
Q. Mr. President, are you going away tomorrow ?
THE PRESIDENT. I am thinking of going away about 10 or 11 o'clock.
Note: President Hoover's twentieth news conference was held in the White House at 4 p.m. on Friday, May 10, 1929.
Herbert Hoover, The President's News Conference Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/209986