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CT/CDT
Central Time
GMT -5
12am
3am
6am
9am
12pm
3pm
6pm
9pm
KST
Korea Standard Time
GMT +9
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

7:00 am07:00 CDT (UTC-5), Oct 10, 2026 = 9:00 pm21:00 KST (UTC+9), Oct 10, 2026

CDT is 14 hours behind KST.

How the time difference changes

For most of the year, CT is 14 hours behind KST. At other times of the year, CT is 15 hours behind KST.

For most of the year, working hours of 9:00 am to 5:00 pm in CT correspond to 11:00 pm to 7:00 am (next day) in KST. At other times of the year, working hours of 9:00 am to 5:00 pm in CT correspond to 12:00 am (next day) to 8:00 am (next day) in KST.For most of the year, working hours of 09:00 to 17:00 in CT correspond to 23:00 to 07:00 (next day) in KST. At other times of the year, working hours of 09:00 to 17:00 in CT correspond to 00:00 (next day) to 08:00 (next day) in KST.

Compare CT time with KST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Central Daylight Time is 14 hours behind Korea Standard Time.
7:00 am07:00 in CDT is 9:00 pm21:00 in KST

CDT to KST call time
Best time for a conference call or a meeting is between 5:30pm-6:30pm17:30-18:30 in CDT which corresponds to 7:30am-8:30am07:30-08:30 in KST (next day)

7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours

7:00 am07:00 CDT / 9:00 pm21:00 KST

CTKST
12:00am2:00pm
1:00am3:00pm
2:00am4:00pm
3:00am5:00pm
4:00am6:00pm
5:00am7:00pm
6:00am8:00pm
7:00am9:00pm
8:00am10:00pm
9:00am11:00pm
10:00am12:00am
11:00am1:00am
12:00pm2:00am
1:00pm3:00am
2:00pm4:00am
3:00pm5:00am
4:00pm6:00am
5:00pm7:00am
6:00pm8:00am
7:00pm9:00am
8:00pm10:00am
9:00pm11:00am
10:00pm12:00pm
11:00pm1:00pm
00:0014:00
01:0015:00
02:0016:00
03:0017:00
04:0018:00
05:0019:00
06:0020:00
07:0021:00
08:0022:00
09:0023:00
10:0000:00
11:0001:00
12:0002:00
13:0003:00
14:0004:00
15:0005:00
16:0006:00
17:0007:00
18:0008:00
19:0009:00
20:0010:00
21:0011:00
22:0012:00
23:0013:00

Central Time

Central Time (CT) is a general term used to describe the areas that observe either the Central Standard Time (CST) or Central Daylight Time (CDT) in the United States and Canada. CT is not static but switches between CDT and CST.

Territories observing the time zone are primarily in North and Central America. It runs through several Mexican and U.S. states, as well as several Canadian provinces and Central American countries.

Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States.

Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Iztapalapa, Ecatepec.

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

CT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for CT
  • S - short form of 'Sierra'
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone

Korea Standard Time

Offset: KST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries using this time zone: Korea (North), Korea (South)

Principal Cities: The largest city in the KST time zone is Seoul in South Korea, with about 10.349 million people. Other major cities in this time zone include Busan, Pyongyang, Incheon, Daegu.

Daylight Saving: Clocks in Korea Standard Time (KST) do not change for daylight saving time, so KST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

KST Time Zone Geo Map
KST timezone map

KST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +09 - basic short
  • +0900 - basic
  • +09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • India - Military abbreviation for KST
  • I - short form of 'India'
IANA/Olson: Reflects KST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Pyongyang
  • Asia/Seoul
  • ROK
KST Abbreviation: Several time zones share KST abbreviation and it could refer to these time zones
  • Korea Standard Time - UTC +9
  • Pyongyang Time - UTC +8:30
Time zones with the GMT +9 offset:
  • AWDT - Australian Western Daylight Time
  • CHOST - Choibalsan Summer Time
  • I - India Time Zone
  • IRKST - Irkutsk Summer Time
  • JST - Japan Standard Time
  • KST - Korea Standard Time
  • PWT - Palau Time
  • TLT - East Timor Time
  • ULAST - Ulaanbaatar Summer Time
  • WIT - Eastern Indonesian Time
  • YAKT - Yakutsk Time