KST to EST to Houston Time Converter

Updating current time…
KST
Korea Standard Time
UTC+9
12am
3am
6am
9am
12pm
3pm
6pm
9pm
EDT/EST
Eastern Daylight Time
UTC−4
13h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Eastern Time is on daylight saving time: EDT (UTC−4) until Sun, Nov 1.
Use EST all year (UTC−5)
Houston
Texas, USACDT
UTC−5
14h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Houston's clocks go back 1 hour on Sun, Nov 1 · CDT → CST

Quick answers

Selected conversion

9:00 pm21:00 KST (UTC+9), Oct 26, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 26, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 26, 2026

KST is 13 hours ahead of EDT. KST is 14 hours ahead of Houston.

How the time difference changes

KST to EST

For most of the year, KST is 13 hours ahead of EDT. From Nov 1, 2026 to Mar 14, 2027, KST is 14 hours ahead of EST.

For most of the year, working hours of 9:00 am to 6:00 pm in KST correspond to 8:00 pm (previous day) to 5:00 am in EDT. At other times of the year, working hours of 9:00 am to 6:00 pm in KST correspond to 7:00 pm (previous day) to 4:00 am in EST.For most of the year, working hours of 09:00 to 18:00 in KST correspond to 20:00 (previous day) to 05:00 in EDT. At other times of the year, working hours of 09:00 to 18:00 in KST correspond to 19:00 (previous day) to 04:00 in EST.

KST to Houston

For most of the year, KST is 14 hours ahead of Houston. From Nov 1, 2026 to Mar 14, 2027, KST is 15 hours ahead of Houston.

For most of the year, working hours of 9:00 am to 6:00 pm in KST correspond to 7:00 pm (previous day) to 4:00 am in Houston. At other times of the year, working hours of 9:00 am to 6:00 pm in KST correspond to 6:00 pm (previous day) to 3:00 am in Houston.For most of the year, working hours of 09:00 to 18:00 in KST correspond to 19:00 (previous day) to 04:00 in Houston. At other times of the year, working hours of 09:00 to 18:00 in KST correspond to 18:00 (previous day) to 03:00 in Houston.

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

Time Difference

Korea Standard Time is 13 hours ahead of Eastern Daylight Time. Korea Standard Time is 14 hours ahead of CDT (Central Daylight Time).
9:00 pm21:00 in KST is 8:00 am08:00 in EDT and is 7:00 am07:00 in Houston, TX, USA

KST to EDT call time
Best time for a conference call or a meeting is between 7:30am-8:30am07:30-08:30 in KST which corresponds to 6:30pm-7:30pm18:30-19:30 in EDT (previous day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
KST to Houston call time
Best time for a conference call or a meeting is between 8am-9am08:00-09:00 in KST which corresponds to 6pm-7pm18:00-19:00 in Houston (previous day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.

9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
7:00 am07:00 CDT (Central Daylight Time) (Houston, TX, USA). Offset UTC -5:00 hours

9:00 pm21:00 KST / 8:00 am08:00 EDT / 7:00 am07:00 Houston, TX, USA

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
KSTEDTHouston, TX, USA
11:00am previous day10:00am previous day
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Korea Standard Time

Offset: KST is 9 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: North Korea, South Korea

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.

Map of the areas on Korea Standard Time (KST)
KST all year

Open the world time zone map© OpenStreetMap

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

Eastern Standard Time

Offset: EST is 5 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, Turks and Caicos Islands, United States

Principal Cities: The largest city in the EST time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

Map of the areas on Eastern Standard Time (EST)
EST all year EST part of the year

Today the lighter areas are on UTC−4 (EDT).

Open the world time zone map© OpenStreetMap

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Eastern Daylight Time (EDT).

123456789101112End: Eastern Standard Time (EST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

123456789101112Start: Eastern Standard Time (EST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

See USA daylight saving time and upcoming clock changes worldwide.

EST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for EST
  • R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Atikokan
  • America/Cancun
  • America/Cayman
  • America/Coral_Harbour
  • America/Detroit
  • America/Fort_Wayne
  • America/Grand_Turk
  • America/Indiana/Indianapolis
  • America/Indiana/Marengo
  • America/Indiana/Petersburg
  • America/Indiana/Vevay
  • America/Indiana/Vincennes
  • America/Indiana/Winamac
  • America/Indianapolis
  • America/Iqaluit
  • America/Jamaica
  • America/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Panama
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST
  • EST5EDT
  • Jamaica
  • US/East-Indiana
  • US/Eastern
  • US/Michigan
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone

Houston Time Zone and Facts

Time Zone

Abbreviation / Offset
CDT – Central Daylight Time, UTC-5 (now, daylight saving time)
CST – Central Standard Time, UTC-6 (standard time)
Daylight Saving Time Ends
123456789101112Sunday, November 1, 2026 at 2:00 amSunday, November 1, 2026 at 02:00: clocks go back 1 hour to 1:00 am01:00 (CST). DST ends on the 1st Sunday of November each year. Also called Fall Back or Winter Time.
Daylight Saving Time Starts
123456789101112Sunday, March 14, 2027 at 2:00 amSunday, March 14, 2027 at 02:00: clocks go forward 1 hour to 3:00 am03:00 (CDT). DST starts on the 2nd Sunday of March each year. Also called Spring Forward or Summer Time.
Clock Changes
USA daylight saving time · Clock changes worldwide

Houston Facts

Country
USA
State
Texas
Alternative Names
Chiouston, HOU, Hiu-su-tun, Hiustonas, Hiû-sṳ̂-tûn, Hjuston, Hjustona, Hjūstona, Houston, Houston City, Hustonia, Hyuston, Kh'juston, Khjustn, Khjustan, Khjuston, hi'ustana, hiustʼoni, hiws tan, hiyustan, hou si dun, husatana, hyuseuteon, hyustan, hyustana, hyusuton, hywstn, hywstwn, xiu si dun, ywstwn, Χιούστον, Хьюстон, Хюстан, Хюстон, Хюстън, Хјустон, Հյուստոն, היוסטן, יוסטון, هيوستن, هیوستون, ھیووستن, ہywsٹn, ہیوسٹن, ह्युस्टन, হিউস্টন, ਹੂਸਟਨ, હ્યુસ્ટન, ஹியூஸ்டன், హ్యూస్టన్, ഹ്യൂസ്റ്റൺ, ฮิวสตัน, ဟူစတန်မြို့, ჰიუსტონი, ሂውስተን, ヒューストン, 休斯敦, 休斯頓, 侯斯頓, 휴스턴
Population
2,314,157
Currency
Dollar (USD)
Geographic Coordinates
29° 45' N Latitude / 95° 21' W Longitude
International Dialing Code
+1
More About Houston
Houston local time and city facts