Niles MI and South Bend IN are, for practical purposes, one city. US 31 between them is an almost unbroken commercial strip, and many people live in Niles while working and shopping in South Bend. But, for at least part of the year, they're in different time zones. There's only State Line Road, and two small road signs on each side of the border, indicating that you're crossing from MI to IN. But, if you watch the bank time and temp clocks along US 31, you'll suddenly notice that you've moved ahead or behind one hour.

My uncle lived in Niles and worked in South Bend, when my grandmother lived there. When the two citites were on different times, he left his watch on SB (Central) time.

For a few years in the late 60s/early 70s, eastern MI and ON were an hour apart in the summer, when the eastern part of the state stayed on standard time. So Detroit and Windsor were in different time zones. Windsor radio station CKLW, whose audience was mostly in the US, used to give two-way time checks. Later, they used Daylight time only.

The time difference meant that some network TV shows seen in Detroit and Flint/Saginaw aired an hour later in Grand Rapids and Kalamazoo, on tape delay, and you could see them twice if you lived somewhere in between. Back then, Michigan had only one regional edition of TV Guide, and it printed brief courtesy listings in Central time for west Michigan. For example, for an NBC show airing on Grand Rapids ch 8 at 9 PM, the listing would read "see 8 PM ch 4 Detroit."

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