Here is some support for Garland's assertion that ``Cleveland and Detroit advanced their clocks one hour in 1914.'' (Well, at least the Cleveland part.) This does suggest that parts of Ohio were in the central time zone before then, and not in North America/New York.
From "The Newark (Ohio) Daily Advocate", June 18, 1914, page 4, column 2: Cleveland and several other Ohio cities have recently changed or planned to change their clocks from Central to Eastern standard time. As every clock will be set one hour ahead, that means that there will be one hour more of day-light after supper or dinner, whichever the evening meal is called.
From "The Ogden (Utah) Standard", June 20, 1914, page 4, column 1 : Cleveland is about to change its clocks from central to eastern standard time, in order to make longer the period after working hours until dark.
Jeff Prucher