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UTC to CST Converter

US Central Time is UTC−6 (CST) in winter and UTC−5 (CDT) in summer.

Coordinated Universal TimeUTC

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UTC
—difference

Central TimeChicago

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CST

Subtract 6 hours from UTC for CST and 5 hours for CDT. This page is US Central Time, not China Standard Time (UTC+8).

Convert UTC to CT

— Central Time

UTC to CST conversion table

Formula: CT = UTC − 6 hours (UTC→CST) or − 5 hours (UTC→CDT).

UTCCT · UTC → CSTCT · UTC → CDT
00:006:00 PM prev day7:00 PM prev day
01:007:00 PM prev day8:00 PM prev day
02:008:00 PM prev day9:00 PM prev day
03:009:00 PM prev day10:00 PM prev day
04:0010:00 PM prev day11:00 PM prev day
05:0011:00 PM prev day12:00 AM
06:0012:00 AM1:00 AM
07:001:00 AM2:00 AM
08:002:00 AM3:00 AM
09:003:00 AM4:00 AM
10:004:00 AM5:00 AM
11:005:00 AM6:00 AM
12:006:00 AM7:00 AM
13:007:00 AM8:00 AM
14:008:00 AM9:00 AM
15:009:00 AM10:00 AM
16:0010:00 AM11:00 AM
17:0011:00 AM12:00 PM
18:0012:00 PM1:00 PM
19:001:00 PM2:00 PM
20:002:00 PM3:00 PM
21:003:00 PM4:00 PM
22:004:00 PM5:00 PM
23:005:00 PM6:00 PM

Only the US side changes for daylight saving (in 2026: Mar 8 and Nov 1), so the gap shifts by 1 hour twice a year.

Business hours in UTC

A 9 AM–5 PM working day in Central Time runs 15:00–23:00 UTC in winter (CST) and 14:00–22:00 UTC in summer (CDT). Server logs, flight times, and APIs usually use UTC, so keep this window handy when scheduling deployments or calls.

Frequently asked questions

What is 15:00 UTC in CST?

15:00 UTC is 9:00 AM CST, or 10:00 AM CDT in summer.

Is CST UTC−6?

Yes, US Central Standard Time is UTC−6. Central Daylight Time (CDT) is UTC−5.

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