Happy Birthday to Happy Birthday! On Sometime around this date in 1893 sisters Patty and Mildred J. Hill, who were both elementary school teachers in Louisville, Kentucky, first published “Happy Birthday to You”—one of the most iconic and popular songs in the English Language. Apparently, this makes June 27th “Happy Birthday Day,” so let sounds of that popular ditty roll around in your brain while you browse through some of the Smithsonian’s birthday-related collections . . .