UTC to CST converter
CST is 6 hours behind UTC. UTC never moves and CST does, so this gap is not the same number all year. The full hour-by-hour table is below, and it reads perfectly well with JavaScript turned off. No account, no email address.
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For conversions between other time zones, visit timezone.day.
UTC to CST, hour by hour
Shaded rows are inside a nine-to-five working day in both UTC and Chicago.
| UTC | CST |
|---|---|
| 6:00am | 12:00am |
| 7:00am | 1:00am |
| 8:00am | 2:00am |
| 9:00am | 3:00am |
| 10:00am | 4:00am |
| 11:00am | 5:00am |
| 12:00pm | 6:00am |
| 1:00pm | 7:00am |
| 2:00pm | 8:00am |
| 3:00pm | 9:00am |
| 4:00pm | 10:00am |
| 5:00pm | 11:00am |
| 6:00pm | 12:00pm |
| 7:00pm | 1:00pm |
| 8:00pm | 2:00pm |
| 9:00pm | 3:00pm |
| 10:00pm | 4:00pm |
UTC to CST is not the same gap all year
UTC never moves and CST does, so this gap is not the same number all year. UTC is the reference every other zone is measured from; it has no summer form at all. The US side changes on the second Sunday in March and back on the first Sunday in November. Between those two Sundays the real difference is one hour less than the 6 hours behind this page is named for.
Strictly, CST is the winter clock. In July those cities are on CDT (Central Daylight Time), one hour ahead of CST, and hardly anyone says so out loud. That one hour is the single most common conversion mistake there is, and it is why a July call booked from a January table arrives an hour late.
UTC and CST
- Same all year
- No, one hour less for part of the year
- Shared office hours
- 2 hours
Booking a call between UTC and Chicago
You share about 2 hours of a normal nine-to-five day. 3:00pm to 5:00pm in UTC is 9:00am to 11:00am in CST: inside office hours at both ends, and the only window where neither side is doing you a favour.
When it is 9:00am in UTC it is 3:00am in Chicago. When Chicago opens at 9:00am, UTC reads 3:00pm.
UTC covers the reference every other zone is measured from, used by aviation, computing and the military worldwide. CST covers the US midwest, Texas and central Canada: Chicago, Dallas, Houston, Winnipeg, Mexico City.
UTC to CST: common questions
What time is it in CST when it is 9am UTC?
3:00am. CST is 6 hours behind UTC. The table above runs the same conversion for every hour of the day.
Why is my UTC to CST conversion off by an hour?
Because of daylight saving. UTC never moves and CST does, so this gap is not the same number all year. UTC is the reference every other zone is measured from; it has no summer form at all. The US side changes on the second Sunday in March and back on the first Sunday in November. Between those two Sundays the real difference is one hour less than the 6 hours behind this page is named for. If a conversion looks an hour out, check which side of a clock change the date falls on.
Does converting UTC to CST ever change the date?
For most of the working day, no. The two clocks stay on the same calendar day. Late evening and very early morning can straddle midnight, which is why the table above shows the day alongside the time.
What is a good time to schedule a call between UTC and CST?
You share about 2 hours of the normal nine-to-five working day: 3:00pm to 5:00pm in UTC is 9:00am to 11:00am in CST. Anything inside that window is inside office hours at both ends.
Is this UTC to CST converter free?
Yes, completely. No account, no email address, no trial. The table works with JavaScript turned off and nothing you type is sent anywhere.
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