Given that Arizona does not observe Daylight Saving Time (DST) for most of the year, and Michigan does, calculating the time difference between these two states requires considering this factor. Arizona is typically on Mountain Standard Time (MST), which is GMT-7. Michigan is on Eastern Standard Time (EST), which is GMT-5, but observes EDT during DST, making it GMT-4. Therefore, when it is 3:30 PM in Arizona (MST), it is typically 6:30 PM in Michigan (EST) during standard time. However, during DST, it would be 7:30 PM in Michigan (EDT).
Accurately determining the corresponding time in different locations is crucial for coordinating meetings, travel arrangements, and various business operations. Understanding time zone differences helps prevent scheduling conflicts and ensures timely communication across geographically diverse areas. Historically, inconsistent timekeeping practices across regions led to significant disruptions in commerce and transportation, highlighting the need for standardized time zones and DST observance.