In the late 19th century Evanston, Illinois, nicknamed "Heavenston" by Frances Willard, was a Methodist-minded town, so pious that the town fathers, resenting the dissipating influence of the soda fountain, passed an ordinance forbidding the sale of ice cream sodas on Sunday. Some ingenious confectioners, obeying the law, served ice cream with syrup but no soda. This sodaless soda was the Sunday soda, and became so popular that orders for "Sundays" crossed the counter everyday of the week. When objection was raised to christening the dish after the Sabbath, the spelling was changed to Sundae, and so developed one of America's most characteristic dishes.

William Lyon Phelps