Most of Indiana 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, Indiana switches to Eastern Daylight Time (EDT), which is UTC-4.
The majority of Indiana follows Eastern Time, including Indianapolis, Fort Wayne, and South Bend. However, northwestern and southwestern counties near Chicago and Evansville observe Central Time (UTC-6/UTC-5). Indiana's timezone history has been complex, fully adopting DST statewide only in 2006.
Indiana's timezone situation is unique. When it's 9 AM in Indianapolis (Eastern Time), it's 8 AM in Gary near Chicago (Central Time). This creates interesting dynamics for businesses operating across state lines.