Naperville, Illinois, United States (City)     Current Local Time: In 24-hour Notation: Sun., Dec. 03, 2023 03:08:13 P.M. CST Sun., Dec. 03, 2023 15:08:13 CST Local Time Zone: America/Chicago Currently Observing: Standard Time Universal Coordinated Time: Sun., Dec. 03, 2023 21:08:13 UTC/GMT

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