Buckingham Fountain to flow at 'Switch on Summer' celebration, officially marking the start of summer in Chicago on Saturday, May 10. https://www.chicagostarmedia.com/candid_candace/buckingham-fountain-turns-on-officially-marking-the-start-of-summer-in-chicago/article_8fb1d097-34f0-4081-a49f-b6e7b019d8b0.html