Dublin is 6 hours ahead of Chicago. Dublin uses Greenwich Mean Time/Irish Standard Time (GMT/IST, UTC+0/+1) while Chicago uses Central Time (CT, UTC-6/-5). When it's 12:00 PM in Dublin, it's 6:00 AM in Chicago.
Both cities observe daylight saving time, though on slightly different schedules, so the difference can vary during transition periods.
Best calling time: 3:00 PM - 9:00 PM Dublin time. This corresponds to 9:00 AM - 3:00 PM in Chicago, covering business hours.
Dublin and Chicago share strong Irish-American cultural ties. Chicago has one of the largest Irish-American populations in the US and hosts a famous St. Patrick's Day celebration. There are direct flights between the cities.