"[President] Coolidge chose to celebrate July 4 [1927] -- which also happened to be his fifty-fifth birthday -- by remaining in South Dakota, where he was having the time of his life. In recognition of all the publicity he was generating with his trip, the state of South Dakota presented him on his birthday with a cowboy outfit and horse. Named Kit, the horse was charitably described as 'spirited.' It was in fact all but untamed. The President, who was by no means a horseman was prudently kept well away from it. Instead his delighted attention was focused on his other main present -- a cowboy outfit consisting of a ten-gallon hat, bright red shirt, capacious blue neckerchief, chaps, boots, and spurs. Coolidge retired to put it all on and emerged clankingly, and a little clumsily, in the full regalia a few minutes later. He looked ridiculous, but very proud, and posed happily for photographers, who could not believe their luck. 'Here was one of the great comic scenes in American history,' wrote Robert Benchley in The New Yorker that week.
Coolidge loved that outfit and wore it for the rest of the summer whenever he could. According to lodge staff, he often changed into it in the evening after his more formal day's duties were done, and for a few hours ceased to be the most important man in America and instead was just a happy cowpoke."
-- Bill Bryson, on President Calvin Coolidge's genuine love for an utterly goofy cowboy outfit given to him as a birthday gift during a vacation in the Black Hills of South Dakota in July 1927, recounted in Bryson's book One Summer: America, 1927 (BOOK | KINDLE | AUDIO).