Most of Michigan operates on Eastern Standard Time (EST) during winter months, which is 5 hours behind Coordinated Universal Time (UTC-5). During daylight saving time, observed from the second Sunday in March to the first Sunday in November, Michigan switches to Eastern Daylight Time (EDT), which is UTC-4.
The majority of Michigan follows Eastern Time, including Detroit, Grand Rapids, Warren, and Ann Arbor. However, the four Upper Peninsula counties bordering Wisconsin observe Central Time (UTC-6/UTC-5). Most of Michigan's population and automotive industry is in the Eastern Time Zone.
Michigan is the heart of the American automotive industry. When it's 9 AM in Detroit, it's 10 AM in New York and 3 PM in Frankfurt, Germany, coordinating with global automotive headquarters and European car manufacturers.