Guinness A Day Seven Pints GilroyOriginal vintage Guinness advertising poster A Guinness a day Guinness is good for you featuring an iconic design depicting seven smiling pints of Guinness beer, one glass for each day of the week, with the text above and below in stylised red and black letters. The successful advertising campaign slogan "Guinness is good for you" became well known worldwide from the 1930s; it first appeared in the press in February 1929, and became well known