Reykjavik to Chicago Time
GMT to CST Converter — 9 AM GMT is 3:00 AM CST
Reykjavik is 6 hours ahead of Chicago. Convert any time between Reykjavik (GMT) and Chicago (CST/CDT) instantly.
Reykjavik
Iceland
Chicago
United States
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Time Zone Comparison
Reykjavik to Chicago Time Conversion Table
| Reykjavik (GMT) | Chicago (CST) |
|---|---|
| 12:00 AM | 7:00 PM |
| 2:00 AM | 9:00 PM |
| 4:00 AM | 11:00 PM |
| 6:00 AM | 1:00 AM |
| 8:00 AM | 3:00 AM |
| 10:00 AM | 5:00 AM |
| 12:00 PM | 7:00 AM |
| 2:00 PM | 9:00 AM |
| 4:00 PM | 11:00 AM |
| 6:00 PM | 1:00 PM |
| 8:00 PM | 3:00 PM |
| 10:00 PM | 5:00 PM |
Reykjavik & Chicago — Business & Scheduling Guide
Reykjavik (Iceland) is a small but highly connected Nordic island economy, with key industries in fishing, geothermal energy, tourism, and aluminum smelting. Chicago is the Midwest's financial and logistics powerhouse, known for commodities trading (CME), manufacturing, logistics, and SaaS companies. With a 6-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Reykjavik and Chicago
The 6-hour difference between Reykjavik and Chicago requires careful scheduling. The best overlap window is typically 2–4 hours when both cities are within working hours. Icelandic business hours are typically 9 AM–5 PM, with one of the world's highest internet penetration rates. US business hours typically run 9 AM–5 PM, with a culture that values punctuality and efficiency. Teams often designate specific "overlap hours" for real-time collaboration and use asynchronous communication (Slack, email, recorded video) for the rest of the day.
Daylight Saving Time Considerations
Chicago observes Daylight Saving Time (CST/CDT), while Reykjavik stays on GMT year-round. When Chicago switches to daylight time, the effective time difference shifts by 1 hour. This typically happens in spring and fall, and the exact dates vary by country. If you have recurring cross-timezone meetings, recalculate the schedule after each DST transition.
Collaboration Tools & Workflow
The 6-hour gap between Reykjavik and Chicago means teams get roughly half a day of overlapping work hours. Successful cross-timezone teams typically batch synchronous activities (standups, reviews, planning) into the overlap window and reserve solo deep work for non-overlapping hours. Tools like Loom for async video updates, Slack with status indicators showing each team's local time, and shared Notion docs help bridge the gap. Many teams adopt a "follow-the-sun" workflow where handoffs happen at the edges of each team's workday.
Remote Work Between Reykjavik & Chicago
Reykjavik, a key city in Iceland, and Chicago, commodities trading (CME), represent a common corridor for distributed teams navigating a 6-hour time difference. Remote workers and freelancers operating between these cities should plan their day around the overlap window — typically the late morning for one city and early morning or late afternoon for the other. Using a world clock widget, setting Slack status with local time, and blocking "no-meeting" deep work hours outside the overlap are essential practices for productive cross-timezone remote collaboration between Reykjavik and Chicago.
GMT to CST — Quick Reference
GMT (GMT) stands for the timezone used in Reykjavik, Iceland (UTC+0). CST (CST/CDT) is the timezone used in Chicago, United States (UTC-6). Reykjavik is 6 hours ahead of Chicago.
To convert GMT to CST, subtract 6 hours from GMT time. For example, GMT 9:00 AM = CST 3:00 AM.
Key Facts
- •Time difference: Reykjavik (UTC+0) is 6 hours ahead of Chicago (UTC-6).
- •Daylight Saving Time: Reykjavik does not observe DST (GMT). Chicago observes DST (CST/CDT).
- •Regions: Reykjavik is located in Iceland and uses the GMT time zone. Chicago is located in United States and uses the CST/CDT time zone.
- •Best time to call: The best time to call between Reykjavik and Chicago is 3:00 PM to 4:00 PM in Reykjavik time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Reykjavik and Chicago?
Reykjavik is 6 hours ahead of Chicago.
What time is it in Chicago when it's 9 AM in Reykjavik?
When it's 9:00 AM in Reykjavik, it is 3:00 AM in Chicago.
What time is 9 PM GMT in CST?
9 PM GMT (Reykjavik time) is 3:00 PM CST (Chicago time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Reykjavik and Chicago?
The best time to schedule a meeting is between 3:00 PM to 4:00 PM in Reykjavik time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert GMT to CST?
GMT (GMT) is the timezone for Reykjavik, Iceland (UTC+0). CST (CST/CDT) is the timezone for Chicago, United States (UTC-6). Reykjavik is 6 hours ahead of Chicago. Quick examples: 9 AM GMT = 3:00 AM CST, 12 PM GMT = 6:00 AM CST, 3 PM GMT = 9:00 AM CST, 6 PM GMT = 12:00 PM CST.
Is Reykjavik ahead of or behind Chicago?
Reykjavik is 6 hours ahead of Chicago. When it's noon in Reykjavik, it's 6:00 AM in Chicago.
Does Reykjavik or Chicago change clocks for Daylight Saving Time?
No, Reykjavik does not observe DST — it stays on GMT year-round. Chicago observes DST and switches between CST/CDT. Because only one city observes DST, the time difference shifts by 1 hour during transition periods (typically March/April and October/November).
What time is noon in Reykjavik in Chicago time?
When it is 12:00 PM (noon) in Reykjavik (GMT), it is 6:00 AM in Chicago (CST). This is often a popular time for scheduling lunch-hour calls across the Reykjavik–Chicago corridor.
What are the overlapping work hours between Reykjavik and Chicago?
The overlapping work hours between Reykjavik and Chicago are approximately 3:00 PM to 4:00 PM in Reykjavik time, when both cities are within the standard 9 AM–5 PM workday. This is the ideal window for meetings, pair programming, and real-time collaboration.
What timezone is Reykjavik in?
Reykjavik is in the GMT time zone (UTC+0). It is located in Iceland. Reykjavik does not observe Daylight Saving Time.
What timezone is Chicago in?
Chicago is in the CST/CDT time zone (UTC-6). It is located in United States. Chicago observes Daylight Saving Time, switching between CST/CDT.
How do I schedule a call between Reykjavik and Chicago?
To schedule a call between Reykjavik and Chicago, aim for the overlapping window of 3:00 PM to 4:00 PM in Reykjavik time. Use Google Calendar or Calendly with both time zones visible, share the meeting invite with the CST time clearly noted, and always double-check the time difference — especially during DST transitions. Pro tip: include both local times in the calendar invite title (e.g., "Sync — 10 AM GMT / 4:00 AM CST").
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