You might be surprised to know that Michigan didn't implement Daylight Saving Time (DST) when Congress initially ordered all states to use DST. In 1966, Congress passed the Uniform Time Act requiring all 50 state to go on the same Daylight Saving Time.
After the initial order to go to DST in 1966, Michigan voters approved Public Act 6 of 1967, rejecting Daylight Saving Time. That meant Michigan remained on Standard Time.
But we Michiganders must have wanted Daylight Saving Time. In 1972, voters repealed Public Act 6 of 1967 in the state election. Michigan began observing Daylight Saving Time in 1973.
For a complete chronology of Michigan and Daylight Savings Time, see Mark Torregrossa, "Hate the time change? Michigan killed it once, then brought it back", MLive, March 12, 2016.
Here's a timeline of all the time changes in Michigan.