Naperville, Illinois, United States (City)     Current Local Time: In 24-hour Notation: Sat., Apr. 19, 2025 04:39:03 P.M. CDT Sat., Apr. 19, 2025 16:39:03 CDT Local Time Zone: America/Chicago Currently Observing: Daylight Savings Time Universal Coordinated Time: Sat., Apr. 19, 2025 21:39:03 UTC/GMT

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