GMT to CST time converter
Central Time (CST) is 6 hours behind Greenwich Mean Time (GMT) in January and 5 hours behind in July, because daylight saving time shifts the difference. Use the grid below to line up Greenwich and Chicago: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 09:43 UTC in Greenwich and 04:43 CDT in Chicago.
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
GMT to CST: frequently asked
What is the time difference between GMT and CST?
Central Time (CST) is 6 hours behind Greenwich Mean Time (GMT) in January and 5 hours behind in July, because daylight saving time shifts the difference.
What time is 9 AM GMT in CST?
9:00 AM GMT is 3:00 AM CST in January, and 4:00 AM CST in July.
When do working hours overlap between Greenwich and Chicago?
In January: Both sides are within 9:00 AM–5:00 PM working hours between 3:00 PM and 5:00 PM GMT (9:00 AM to 11:00 AM CST). In July: Both sides are within 9:00 AM–5:00 PM working hours between 2:00 PM and 5:00 PM GMT (9:00 AM to 12:00 PM CST).