How many hours is KST ahead of EST?

KST is currently +13h relative to EST, using America/New_York and Asia/Seoul as the live reference zones on this page.

What is the best workday overlap between EST and KST?

There is no strict 9-to-5 overlap right now, so one side usually needs an early start or late finish for live meetings.

Which cities commonly use EST and KST?

EST commonly covers cities such as New York City, Toronto, Brooklyn, and Queens, while KST commonly covers cities such as Seoul, Busan, Pyongyang, and Incheon.

Should I use EST/KST or exact IANA zones?

Use the abbreviations for a quick read, but use exact IANA zones such as America/New_York and Asia/Seoul when you need something precise in software, travel plans, or long-range scheduling.

Timezone converter

EST to KST Converter.

EST → KSTGap: +13hNo 9-5 overlap

EST to KST currently uses Eastern Time in America/New_York and Korean Time in Asia/Seoul as the live reference pair, with a +13h live gap. EST to KST matters whenever New York City and Seoul need to coordinate across a +13h gap. The EST side covers United States and Canada, while KST covers South Korea and North Korea — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.

Last updated recently. Offset math, DST behavior, and city coverage on both sides are refreshed from the live timezone dataset during the page revalidation window.

From

EST

Eastern Time

America/New_York · EDT -04:00

--:--:--

Major markets in this grouping include New York City, Toronto, Brooklyn, Queens.

KST

Korean Time

Asia/Seoul · GMT+9 +09:00

--:--:--

Major markets in this grouping include Seoul, Busan, Pyongyang, Incheon.

Scheduling snapshot

Current gap

+13h

EST -04:00 vs KST +09:00

9-to-5 overlap

No shared block

Meetings usually need an early or late handoff.

Representative countries

United States, Canada, and Haiti / South Korea and North Korea

Based on the busiest city and zone usage found in the current dataset.

Pair context

EST (New York City, -04:00) to KST (Seoul, +09:00) is currently a +13h conversion. Live coverage on the EST side is anchored by New York City, Toronto, Brooklyn, and Queens; the KST side draws from Seoul, Busan, Pyongyang, and Incheon.

EST to KST matters whenever New York City and Seoul need to coordinate across a +13h gap. The EST side covers United States and Canada, while KST covers South Korea and North Korea — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.

This pair is trans-Pacific, with one side in the Americas and the other in Asia or Oceania. The +13h gap is large enough that morning on one side reliably overlaps evening on the other, which is why this conversion mostly serves global supply chains, gaming launch schedules, and follow-the-sun engineering.

EST follows seasonal clock changes through America/New_York, while KST stays on a fixed offset year-round. That asymmetry is the real differentiator on this page: the gap widens or narrows by an hour twice a year, so calendar invites scheduled in one season often look wrong in the other.

EST and KST sit exactly 13h apart, which leaves no shared 9-to-5 block. Live meetings have to bend one side's day, so most teams settle for one of two narrow windows: very early on the late side, or very late on the early side. That makes async messages, recorded standups, and clear handoff notes more valuable than calendar invites.

Pair details

Reference zone, current offsets, country and city anchors, overlap math, and date-shift answers for EST to KST.

Reference pair

America/New_York -> Asia/Seoul

Live offsets

EST -04:00 vs KST +09:00

Meaning split

Eastern Time / Korean Time

Country anchors

United States, Canada, and Haiti -> South Korea and North Korea

City anchors

New York City, Toronto, Brooklyn, Queens -> Seoul, Busan, Pyongyang, Incheon

Workday overlap

No strict 9-to-5 overlap in the current offset state

Morning answer

9 AM EST = 10:00 PM KST, same day

Evening answer

6 PM EST = 7:00 AM KST, next day

Calendar and scheduling context

Same-offset labels can share the same hour while still landing in different countries, calendars, cities, and workday windows. These notes show the practical context behind this conversion.

Exact pair identity

EST to KST is pinned to America/New_York -> Asia/Seoul, with the shorthand labels shown as context. The city anchors are New York City, Toronto, Brooklyn, Queens on the EST side and Seoul, Busan, Pyongyang, Incheon on the KST side, with +13h between the live reference zones.

Civil calendar differences

The 12 popular-hour answers include 3 same-day conversions, 9 next-day conversions, and 0 previous-day conversions. That distribution is what separates this page from a static offset chart.

Same-offset caution

Nearby labels sharing a current offset include EDT (From side), GMT+9 (To side), JST (To side), PWT (To side), WIT (To side), YAKT (To side). They may match mathematically, but their country calendars, city anchors, and common search intent differ from this exact pair.

Jurisdiction evidence

EST: United States (US); 1508 mapped cities; capital Washington, D.C.; English; USD United States dollar | EST: Canada (CA); 310 mapped cities; capital Ottawa; English, French; CAD Canadian dollar | EST: Haiti (HT); 30 mapped cities; capital Port-au-Prince; French, Haitian Creole; HTG Haitian gourde | EST: Jamaica (JM); 11 mapped cities; capital Kingston; English, Jamaican Patois; JMD Jamaican dollar | EST: Mexico (MX); 6 mapped cities; capital Mexico City; Spanish; MXN Mexican peso | KST: South Korea (KR); 147 mapped cities; capital Seoul; Korean; KRW South Korean won | KST: North Korea (KP); 97 mapped cities; capital Pyongyang; Korean; KPW North Korean won

Pair fingerprint

Offset behavior, DST gap changes, local calendar evidence, and the day-shift pattern across the most common conversion hours.

Offset behavior class

EST/KST is a long-haul handoff gap: America/New_York currently reads -04:00, Asia/Seoul reads +09:00, and the live delta is +13h. This class decides whether the page behaves like a same-day planner or a handoff planner.

DST asymmetry check

America/New_York changes from -04:00 (EDT) to -05:00 (EST) on November 1, 2026 at about 1:00 AM.

Calendar evidence

No country holiday snapshot is attached to this exact pair yet, so the page leans on city anchors, IANA zones, offsets, and the live conversion table instead of pretending a local calendar exists.

Day-shift fingerprint

Across the 12 popular-hour answers, this pair has 3 same-day answers, 9 next-day answers, 0 previous-day answers. That mix is specific to the current America/New_York -> Asia/Seoul relationship and helps users see whether dates must be written explicitly in invites, travel plans, and release schedules.

Same-offset and canonical audit

Same-offset converter clusters can look identical if the page only shows a numeric offset. This audit states whether the route should be indexed, which canonical peer it follows when consolidated, and what pair-specific evidence keeps the page useful.

Indexing posture

This pair remains indexable because the route has enough pair-specific context: America/New_York -> Asia/Seoul, country anchors, city anchors, calendar notes, and day-shift examples.

Same-offset math check

EST and KST are not currently a same-offset pair; the live delta is +13h. Same-offset neighbors are still listed because users often confuse nearby abbreviations.

Neighbor audit

EDT (From side, -04:00), GMT+9 (To side, +09:00), JST (To side, +09:00), PWT (To side, +09:00), WIT (To side, +09:00), YAKT (To side, +09:00) The page keeps these labels visible so SGT/HKT/GST-style clusters do not blur into one generic offset page.

Canonical evidence

EST/KST uses 3 same-day answers, 9 next-day answers, 0 previous-day answers; 0h strict workday overlap; source zones America/New_York and Asia/Seoul; country anchors United States, Canada, and Haiti -> South Korea and North Korea.

Local intent behind each abbreviation

Common places, calendars, markets, languages, and operating contexts behindEST and KST.

KST

KST local intent 1

KST is Korean civil time across the Korean peninsula, with Seoul and Busan on the South Korean side and Pyongyang in the wider abbreviation dataset. It shares UTC+9 with Japan, but the real-world calendar differs: Korean public holidays, Chuseok, Seollal, Korea Exchange hours, Korean won settlement, K-pop and gaming launches, and electronics supply-chain schedules create a separate planning context.

KST

KST local intent 2

Use KST when the audience is Korea-specific. A meeting, stream, shipment, or maintenance window aimed at Seoul, Incheon, Daegu, Daejeon, Gwangju, or Busan should not be described as JST just because the offset matches. The abbreviation carries Korean market context, Korean-language expectations, and domestic holiday risk that a generic UTC+9 conversion would miss.

Country calendar contrast

Same-offset conversions can still land in different public-holiday, language, currency, and city-anchor contexts. These rows use the country profile and holiday snapshots behind each side of the pair.

EST

United States

1,508 mapped city anchors; zones America/New_York.capital Washington, D.C.; English; USD United States dollar

Holiday snapshot: New Year's Day (Jan 1, Public) · Martin Luther King, Jr. Day (Jan 19, Public) · Lincoln's Birthday (Feb 12, Observance) · Presidents Day (Feb 16, Public) · Good Friday (Apr 3, Public)

EST

Canada

310 mapped city anchors; zones America/Atikokan, America/Toronto.capital Ottawa; English, French; CAD Canadian dollar

Holiday snapshot: New Year's Day (Jan 1, Public) · Louis Riel Day (Feb 16, Public) · Islander Day (Feb 16, Public) · Heritage Day (Feb 16, Public) · Family Day (Feb 16, Public)

EST

Haiti

30 mapped city anchors; zones America/Port-au-Prince.capital Port-au-Prince; French, Haitian Creole; HTG Haitian gourde

Holiday snapshot: New Year's Day (Jan 1, Public) · Ancestry Day (Jan 2, Public) · Epiphany (Jan 6, Public) · Carnival (Feb 16, Public) · Carnival (Feb 17, Public)

EST

Jamaica

11 mapped city anchors; zones America/Jamaica.capital Kingston; English, Jamaican Patois; JMD Jamaican dollar

Holiday snapshot: New Year's Day (Jan 1, Public) · Ash Wednesday (Feb 18, Public) · Good Friday (Apr 3, Public) · Easter Monday (Apr 6, Public) · Labour Day (May 23, Public)

EST

Mexico

6 mapped city anchors; zones America/Cancun.capital Mexico City; Spanish; MXN Mexican peso

Holiday snapshot: New Year's Day (Jan 1, Public) · Constitution Day (Feb 2, Public) · Benito Juárez's birthday (Mar 16, Public) · Maundy Thursday (Apr 2, Bank) · Good Friday (Apr 3, Bank)

KST

South Korea

147 mapped city anchors; zones Asia/Seoul.capital Seoul; Korean; KRW South Korean won

Holiday snapshot: New Year's Day (Jan 1, Public) · Lunar New Year (Feb 16, Public) · Lunar New Year (Feb 17, Public) · Lunar New Year (Feb 18, Public) · Independence Movement Day (Mar 1, Public)

Neighboring abbreviation checks

These are the labels most likely to be confused with either side of this conversion. A matching UTC offset does not mean the same country, calendar, market, source convention, or user intent.

From side: EDT

same offset

EST and EDT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.

Current side: EST: Eastern Time via America/New_York, -04:00; cities New York City, United States, Toronto, Canada, and Brooklyn, United States; countries United States, Canada, and Haiti.
Neighbor side: EDT: Eastern Time via America/New_York, -04:00; cities New York City, United States, Toronto, Canada, and Brooklyn, United States; countries United States, Canada, and Haiti.

Open EDT

From side: EEST

nearby

EST and EEST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.

Current side: EST: Eastern Time via America/New_York, -04:00; cities New York City, United States, Toronto, Canada, and Brooklyn, United States; countries United States, Canada, and Haiti.
Neighbor side: EEST: Eastern European Time via Africa/Cairo, +03:00; cities Cairo, Egypt, Alexandria, Egypt, and Giza, Egypt; countries Egypt, Ukraine, and Lebanon.

Open EEST

From side: EET

nearby

EST and EET are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.

Current side: EST: Eastern Time via America/New_York, -04:00; cities New York City, United States, Toronto, Canada, and Brooklyn, United States; countries United States, Canada, and Haiti.
Neighbor side: EET: Eastern European Time via Africa/Cairo, +03:00; cities Cairo, Egypt, Alexandria, Egypt, and Giza, Egypt; countries Egypt, Ukraine, and Lebanon.

Open EET

From side: AEDT

nearby

EST and AEDT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.

Current side: EST: Eastern Time via America/New_York, -04:00; cities New York City, United States, Toronto, Canada, and Brooklyn, United States; countries United States, Canada, and Haiti.
Neighbor side: AEDT: Australian Eastern Time via Australia/Sydney, +10:00; cities Sydney, Australia, Brisbane, Australia, and Gold Coast, Australia; countries Australia.

Open AEDT

From side: AEST

nearby

EST and AEST are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.

Current side: EST: Eastern Time via America/New_York, -04:00; cities New York City, United States, Toronto, Canada, and Brooklyn, United States; countries United States, Canada, and Haiti.
Neighbor side: AEST: Australian Eastern Time via Australia/Sydney, +10:00; cities Sydney, Australia, Brisbane, Australia, and Gold Coast, Australia; countries Australia.

Open AEST

From side: WIT

nearby

EST and WIT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.

Current side: EST: Eastern Time via America/New_York, -04:00; cities New York City, United States, Toronto, Canada, and Brooklyn, United States; countries United States, Canada, and Haiti.
Neighbor side: WIT: Eastern Indonesia Time via Asia/Jayapura, +09:00; cities Jayapura, Indonesia, Ambon, Indonesia, and Sorong, Indonesia; countries Indonesia.

Open WIT

To side: GMT+9

same offset

KST and GMT+9 match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.

Current side: KST: Korean Time via Asia/Seoul, +09:00; cities Seoul, South Korea, Busan, South Korea, and Pyongyang, North Korea; countries South Korea and North Korea.
Neighbor side: GMT+9: Timor-Leste Time via Asia/Dili, +09:00; cities Dili, Timor Leste, Maliana, Timor Leste, and Suai, Timor Leste; countries Timor Leste.

Open GMT+9

To side: JST

same offset

KST and JST match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.

Current side: KST: Korean Time via Asia/Seoul, +09:00; cities Seoul, South Korea, Busan, South Korea, and Pyongyang, North Korea; countries South Korea and North Korea.
Neighbor side: JST: Japan Time via Asia/Tokyo, +09:00; cities Tokyo, Japan, Yokohama, Japan, and Osaka, Japan; countries Japan.

Open JST

To side: PWT

same offset

KST and PWT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.

Current side: KST: Korean Time via Asia/Seoul, +09:00; cities Seoul, South Korea, Busan, South Korea, and Pyongyang, North Korea; countries South Korea and North Korea.
Neighbor side: PWT: Palau Time via Pacific/Palau, +09:00; cities Ngerulmud, Palau; countries Palau.

Open PWT

To side: WIT

same offset

KST and WIT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.

Current side: KST: Korean Time via Asia/Seoul, +09:00; cities Seoul, South Korea, Busan, South Korea, and Pyongyang, North Korea; countries South Korea and North Korea.
Neighbor side: WIT: Eastern Indonesia Time via Asia/Jayapura, +09:00; cities Jayapura, Indonesia, Ambon, Indonesia, and Sorong, Indonesia; countries Indonesia.

Open WIT

To side: YAKT

same offset

KST and YAKT match on offset right now, but the page should not collapse them: they carry different city anchors, country calendars, currencies, holidays, and user intent.

Current side: KST: Korean Time via Asia/Seoul, +09:00; cities Seoul, South Korea, Busan, South Korea, and Pyongyang, North Korea; countries South Korea and North Korea.
Neighbor side: YAKT: Yakutsk Time via Asia/Chita, +09:00; cities Chita, Russia, Krasnokamensk, Russia, and Borzya, Russia; countries Russia.

Open YAKT

To side: ACDT

nearby

KST and ACDT are close enough to be confused in search, but they are not the same clock label and should be pinned to exact IANA zones.

Current side: KST: Korean Time via Asia/Seoul, +09:00; cities Seoul, South Korea, Busan, South Korea, and Pyongyang, North Korea; countries South Korea and North Korea.
Neighbor side: ACDT: Australian Central Time via Australia/Adelaide, +09:30; cities Adelaide, Australia, Darwin, Australia, and Adelaide Hills, Australia; countries Australia.

Open ACDT

Jurisdiction and city roster

Abbreviations with the same UTC offset can still represent different countries, cities, currencies, languages, and civil-time histories. This roster keeps theEST to KST page grounded in those concrete places.

EST: Canada (CA); 310 mapped cities; zones America/Atikokan, America/Toronto; city anchors Toronto (America/Toronto, pop 2,794,356), Montréal (America/Toronto, pop 1,762,949), Ottawa (America/Toronto, pop 1,017,449), Mississauga (America/Toronto, pop 717,961); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar.

EST: Haiti (HT); 30 mapped cities; zones America/Port-au-Prince; city anchors Port-au-Prince (America/Port-au-Prince, pop 1,234,742), Carrefour (America/Port-au-Prince, pop 442,156), Delmas (America/Port-au-Prince, pop 382,920), Port-de-Paix (America/Port-au-Prince, pop 306,217); official Republic of Haiti; capital Port-au-Prince; region Americas; subregion Caribbean; population 11,867,032; area 27,750 km2; languages French, Haitian Creole; currency HTG Haitian gourde.

EST: Jamaica (JM); 11 mapped cities; zones America/Jamaica; city anchors Kingston (America/Jamaica, pop 937,700), New Kingston (America/Jamaica, pop 583,958), Spanish Town (America/Jamaica, pop 145,018), Portmore (America/Jamaica, pop 102,861); official Jamaica; capital Kingston; region Americas; subregion Caribbean; population 2,825,544; area 10,991 km2; languages English, Jamaican Patois; currency JMD Jamaican dollar.

EST: Mexico (MX); 6 mapped cities; zones America/Cancun; city anchors Cancún (America/Cancun, pop 888,797), Chetumal (America/Cancun, pop 169,028), Playa del Carmen (America/Cancun, pop 149,923), Cozumel (America/Cancun, pop 77,236); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso.

KST: North Korea (KP); 97 mapped cities; zones Asia/Pyongyang; city anchors Pyongyang (Asia/Pyongyang, pop 3,222,000), Hamhŭng (Asia/Pyongyang, pop 559,056), Namp’o (Asia/Pyongyang, pop 455,000), Sunch’ŏn (Asia/Pyongyang, pop 437,000); official Democratic People's Republic of Korea; capital Pyongyang; region Asia; subregion Eastern Asia; population 25,950,000; area 120,538 km2; languages Korean; currency KPW North Korean won.

Abbreviation identity dossier

Same-offset converter pages can look deceptively alike. These records pin the page to the exact abbreviations, IANA zones, countries, and city anchors behind EST and KST.

From side meaning roster

EST (est) is not marked ambiguous in the abbreviation catalog. Meaning records: Eastern Time at UTC-05:00; listed zones America/Atikokan; America/Cancun; America/Cayman; America/Jamaica; America/Panama; America/Nassau; America/New York; America/Port-au-Prince; America/Grand Turk; America/Toronto; source label Eastern Time - Atikokan.

From side country footprint

EST currently maps to 8 country footprints in the converter dataset: United States (US), Canada (CA), Haiti (HT), Jamaica (JM), Mexico (MX), Panama (PA), Bahamas (BS), Cayman Islands (KY). The footprint spans 9 IANA zones across 10 city anchors.

From side city anchors

EST city anchors in this indexed page family: New York City [new-york-city-US, US, America/New_York, pop 8,804,190]; Toronto [toronto-CA, CA, America/Toronto, pop 2,794,356]; Brooklyn [brooklyn-US, US, America/New_York, pop 2,736,074]; Queens [queens-US, US, America/New_York, pop 2,316,841]; Montréal [montreal-CA, CA, America/Toronto, pop 1,762,949]; Philadelphia [philadelphia-US, US, America/New_York, pop 1,573,916]; Manhattan [manhattan-5125771-US, US, America/New_York, pop 1,487,536]; The Bronx [the-bronx-US, US, America/New_York, pop 1,385,108]; Port-au-Prince [port-au-prince-HT, HT, America/Port-au-Prince, pop 1,234,742]; Ottawa [ottawa-CA, CA, America/Toronto, pop 1,017,449].

From side jurisdiction dossier

EST: United States (US); 1508 mapped cities; zones America/New York; city anchors New York City (America/New_York, pop 8,804,190), Brooklyn (America/New_York, pop 2,736,074), Queens (America/New_York, pop 2,316,841), Philadelphia (America/New_York, pop 1,573,916); official United States of America; capital Washington, D.C.; region Americas; subregion North America; population 340,110,988; area 9,525,067 km2; languages English; currency USD United States dollar. EST: Canada (CA); 310 mapped cities; zones America/Atikokan, America/Toronto; city anchors Toronto (America/Toronto, pop 2,794,356), Montréal (America/Toronto, pop 1,762,949), Ottawa (America/Toronto, pop 1,017,449), Mississauga (America/Toronto, pop 717,961); official Canada; capital Ottawa; region Americas; subregion North America; population 41,651,653; area 9,984,670 km2; languages English, French; currency CAD Canadian dollar. EST: Haiti (HT); 30 mapped cities; zones America/Port-au-Prince; city anchors Port-au-Prince (America/Port-au-Prince, pop 1,234,742), Carrefour (America/Port-au-Prince, pop 442,156), Delmas (America/Port-au-Prince, pop 382,920), Port-de-Paix (America/Port-au-Prince, pop 306,217); official Republic of Haiti; capital Port-au-Prince; region Americas; subregion Caribbean; population 11,867,032; area 27,750 km2; languages French, Haitian Creole; currency HTG Haitian gourde. EST: Jamaica (JM); 11 mapped cities; zones America/Jamaica; city anchors Kingston (America/Jamaica, pop 937,700), New Kingston (America/Jamaica, pop 583,958), Spanish Town (America/Jamaica, pop 145,018), Portmore (America/Jamaica, pop 102,861); official Jamaica; capital Kingston; region Americas; subregion Caribbean; population 2,825,544; area 10,991 km2; languages English, Jamaican Patois; currency JMD Jamaican dollar. EST: Mexico (MX); 6 mapped cities; zones America/Cancun; city anchors Cancún (America/Cancun, pop 888,797), Chetumal (America/Cancun, pop 169,028), Playa del Carmen (America/Cancun, pop 149,923), Cozumel (America/Cancun, pop 77,236); official United Mexican States; capital Mexico City; region Americas; subregion North America; population 130,575,786; area 1,964,375 km2; languages Spanish; currency MXN Mexican peso.

To side meaning roster

KST (kst) is not marked ambiguous in the abbreviation catalog. Meaning records: Korean Time at UTC+09:00; listed zones Asia/Pyongyang; Asia/Seoul; source label Korean Time - Pyongyang, Hamhŭng, Namp’o, Sunch’ŏn.

To side country footprint

KST currently maps to 2 country footprints in the converter dataset: South Korea (KR), North Korea (KP). The footprint spans 2 IANA zones across 10 city anchors.

To side city anchors

KST city anchors in this indexed page family: Seoul [seoul-KR, KR, Asia/Seoul, pop 10,349,312]; Busan [busan-KR, KR, Asia/Seoul, pop 3,285,147]; Pyongyang [pyongyang-KP, KP, Asia/Pyongyang, pop 3,222,000]; Incheon [incheon-KR, KR, Asia/Seoul, pop 3,015,482]; Daegu [daegu-KR, KR, Asia/Seoul, pop 2,365,523]; Daejeon [daejeon-KR, KR, Asia/Seoul, pop 1,441,203]; Gwangju [gwangju-1841811-KR, KR, Asia/Seoul, pop 1,401,235]; Suwon [suwon-KR, KR, Asia/Seoul, pop 1,234,582]; Ulsan [ulsan-KR, KR, Asia/Seoul, pop 1,098,421]; Goyang-si [goyang-si-KR, KR, Asia/Seoul, pop 1,061,752].

To side jurisdiction dossier

KST: South Korea (KR); 147 mapped cities; zones Asia/Seoul; city anchors Seoul (Asia/Seoul, pop 10,349,312), Busan (Asia/Seoul, pop 3,285,147), Incheon (Asia/Seoul, pop 3,015,482), Daegu (Asia/Seoul, pop 2,365,523); official Republic of Korea; capital Seoul; region Asia; subregion Eastern Asia; population 51,159,889; area 100,210 km2; languages Korean; currency KRW South Korean won. KST: North Korea (KP); 97 mapped cities; zones Asia/Pyongyang; city anchors Pyongyang (Asia/Pyongyang, pop 3,222,000), Hamhŭng (Asia/Pyongyang, pop 559,056), Namp’o (Asia/Pyongyang, pop 455,000), Sunch’ŏn (Asia/Pyongyang, pop 437,000); official Democratic People's Republic of Korea; capital Pyongyang; region Asia; subregion Eastern Asia; population 25,950,000; area 120,538 km2; languages Korean; currency KPW North Korean won.

From side timezone narrative

EST is a North or South American civil-time label, currently 4h behind UTC at -04:00. The label covers 10 IANA zones across 9 countries, with New York City as the busiest live reference. The busiest cities using EST in the current catalog are New York City, Toronto, Brooklyn, Queens, and Montréal. The lead live reference on this page is New York City (America/New_York), currently at -04:00 (EDT). Those cities are what give EST its actual feel rather than the abstract offset. EST currently shows -04:00, but America/New_York observes seasonal clock changes — the next transition is around November 1, 2026. That means the offset on this page is a snapshot, not a permanent fact, so long-range scheduling should pin the underlying IANA zone instead of the abbreviation.

From side policy and precision notes

EST reads cleanly across the Americas in this dataset, but the same letters can mean different things elsewhere (notably CST, EST, and IST overlap with non-American labels). Pin the IANA zone when the audience is international. America/New_York has an upcoming offset change on November 1, 2026. After that point, EST on this page will read a different UTC offset until the next transition, so any saved timestamp should anchor to the IANA zone rather than the abbreviation. For precise work, the safest equivalent of EST is the exact IANA zone used by your city or system. America/New_York sits at -04:00, behind UTC, which means daily logs in this zone reach a new calendar date after UTC does — relevant for date-aligned reports and billing cutoffs.

From side nearby abbreviations

EST should not be blindly swapped with nearby labels. Adjacent references in the catalog: EDT (-04:00, Shares the eastern time family); EEST (+03:00, Shares the eastern time family); EET (+03:00, Shares the eastern time family); AEDT (+10:00, Shares the eastern time family); AEST (+10:00, Shares the eastern time family); WIT (+09:00, Shares the eastern time family).

From side answer profile

EST has 1 meaning record, offset range UTC-05:00 to UTC-04:00, labels Eastern Time, and 9 country footprints across 10 IANA zones.

To side timezone narrative

KST is an Asian civil-time label, currently 9h ahead of UTC at +09:00. The lead reference is Seoul, and the wider grouping reaches 2 countries through 2 IANA zones. The busiest cities using KST in the current catalog are Seoul, Busan, Pyongyang, Incheon, and Daegu. The lead live reference on this page is Seoul (Asia/Seoul), currently at +09:00 (GMT+9). Those cities are what give KST its actual feel rather than the abstract offset. KST is stable on Asia/Seoul year-round, with no seasonal clock changes in the next year. That makes it a low-friction choice for recurring meetings and broadcast schedules — but software still prefers the IANA zone because governments can change civil-time rules independently of the short code.

To side policy and precision notes

KST resolves cleanly here, but Asian labels often share letters with American or European ones — IST is shared between India and Israel, for instance. Pinning Asia/Seoul avoids that whole class of confusion. Asia/Seoul does not show an offset change in the next year, which makes KST predictable for short-term scheduling. Predictable is not the same as permanent — civil-time rules still get changed by governments on relatively short notice. For precise work, the safest equivalent of KST is the exact IANA zone used by your city or system. Asia/Seoul sits at +09:00, ahead of UTC, which means daily logs in this zone reach a new calendar date before UTC does — a small detail that breaks date-based reporting if missed.

To side nearby abbreviations

KST should not be blindly swapped with nearby labels. Adjacent references in the catalog: GMT+9 (+09:00, Currently sits on the same UTC offset); JST (+09:00, Currently sits on the same UTC offset); PWT (+09:00, Currently sits on the same UTC offset); WIT (+09:00, Currently sits on the same UTC offset); YAKT (+09:00, Currently sits on the same UTC offset); ACDT (+09:30, Runs on a nearby UTC offset).

To side answer profile

KST has 1 meaning record, offset range UTC+09:00, labels Korean Time, and 2 country footprints across 2 IANA zones.

From side country reference summary

EST country anchor United States: The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic consisting of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States also asserts sovereignty over five major island territories and various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 341 million. Source: Wikipedia.

To side country reference summary

KST country anchor South Korea: South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and the Sea of Japan to the east. South Korea claims to be the sole legitimate government of the entire peninsula and adjacent islands. It has a population of about 52 million, of which half live in the Seoul metropolitan area, the ninth most populous metropolitan area in the world, with other major cities being Busan, Daegu, and Incheon. Source: Wikipedia.

To side trust note 1

To side trust note 2

Pair identity check

EST/KST uses America/New_York -> Asia/Seoul, offset delta +13h, overlap 0h, route /convert/est/kst/, and live abbreviation readings EDT/GMT+9.

Reference data for EST to KST

Reference fields include this converter pair's abbreviation records, representative IANA zones, current offsets, city anchors, country profiles, overlap math, conversion examples, and dossier notes.

easterntimeatikokankoreantimepyongyanghamhŭngnamposunchŏnamericanewyorkasiaseouleasterntimekoreantimeunitedstatessouthkoreanorthkoreanewyorkcityusnewyorkcitytorontocaamericatorontobrooklynusbrooklynqueensusmontrealcamontréalmontrealphiladelphiausphiladelphiaportauprincehtportauprinceamericaportauprinceottawacapyongyangkppyongyangasiapyongyangincheonkrwashingtondcunitedstatesdollaramericasnorthamericacanadiandollarhaitiancreolehaitiangourdecaribbeankingstonjamaicanpatoisjamaicandollarmexicocitymexicanpesosouthkoreanwoneasternasianorthkoreanwoncapitalwashingtondcenglishusdunitedstatesdollaramericaatikokanamericatorontocapitalottawaenglishfrenchcadcanadiandollarcapitalportauprincefrenchhaitiancreolehtghaitiangourdeamericajamaicacapitalkingstonenglishjamaicanpatoisjmdjamaicandollaramericacancuncapitalmexicocityspanishmxnmexicanpesocapitalseoulkoreankrwsouthkoreanwonreferencepairamericanewyorkasiaseoulliveoffsetsest0400vskst0900meaningspliteasterntimekoreantimecountryanchorsunitedstatescanadaandhaitisouthkoreaandnorthkoreacityanchorsnewyorkcitytorontobrooklynqueensseoulbusanpyongyangincheonworkdayoverlapnostrict9to5overlapinthecurrentoffsetstatemorninganswer9amest1000pmkstsamedayeveninganswer6pmest700amkstnextdaykstlocalintent1kstlocalintent2exactpairidentitycivilcalendardifferencessameoffsetcautionjurisdictionevidenceoffsetbehaviorclassdstasymmetrycheckamericanewyorkchangesfrom0400edtto0500estonnovember12026atabout100amcalendarevidencedayshiftfingerprintindexingposturesameoffsetmathcheckneighborauditcanonicalevidencefromsidesharestheeasterntimefamilycurrentlysitsonthesameutcoffsetpwtpalautimeviapacificpalau0900citiesngerulmudpalaucountriespalaurunsonanearbyutcoffsetfromsidemeaningrosterfromsidecountryfootprintfromsidecityanchorsfromsidejurisdictiondossiertosidemeaningrostertosidecountryfootprinttosidecityanchorstosidejurisdictiondossierfromsidetimezonenarrativefromsidepolicyandprecisionnotesfromsidenearbyabbreviationsfromsideanswerprofiletosidetimezonenarrativetosidepolicyandprecisionnotestosidenearbyabbreviationstosideanswerprofilefromsidecountryreferencesummarytosidecountryreferencesummarytosidetrustnote1tosidetrustnote2pairidentitycheckksteasterntimeatikokanatikokankoreantimepyongyangpyongyanghamhunghamhungnampnampsunchonamericaamericanew

Market coverage on both sides

EST coverage on this page is led by New York City, United States, Toronto, Canada, Brooklyn, United States, and Queens, United States, with 2 more in the live dataset. That mix is what makes EST feel anchored to East Coast and Central American business activity in practice rather than just an abbreviation on a chart.

KST coverage is led by Seoul, South Korea, Busan, South Korea, Pyongyang, North Korea, and Incheon, South Korea, with 2 more anchoring the wider label family. Combined with the EST side, this conversion ends up describing trans-Pacific outsourcing handoffs, gaming and entertainment release windows, and follow-the-sun engineering rotations.

Digit-roll converter

Adjust the time. Digits roll like an odometer, and the swap button flips the zones.

From

Common meeting times

EST to KST meeting times

Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.

EST	KST	Day relation
9:00 AM	10:00 PMSat, May 30	same day
12:00 PM	1:00 AMSun, May 31	next day
3:00 PM	4:00 AMSun, May 31	next day
6:00 PM	7:00 AMSun, May 31	next day
9:00 PM	10:00 AMSun, May 31	next day

KST to EST meeting times

Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.

KST	EST	Day relation
9:00 AM	8:00 PMSat, May 30	previous day
12:00 PM	11:00 PMSat, May 30	previous day
3:00 PM	2:00 AMSun, May 31	same day
6:00 PM	5:00 AMSun, May 31	same day
9:00 PM	8:00 AMSun, May 31	same day

Operational notes

EST to KST ranges from EST 9:00 AM (which lands at KST 10:00 PM) through EST 9:00 PM (KST 10:00 AM). Most of those slots fall on a different calendar day on the KST side, which is why this direction always needs explicit dates in invites and ticket comments — the time alone is not enough.

KST to EST ranges from KST 9:00 AM (which lands at EST 8:00 PM) through KST 9:00 PM (EST 8:00 AM). With no clean 9-to-5 overlap between KST and EST, both ends of this range push outside standard hours — useful for recorded standups and async work, awkward for live calls.

Overlap window and DST radar

The live gap is +13h right now, based on America/New_York at -04:00 and Asia/Seoul at +09:00. America/New_York changes offset on November 1, 2026, so the gap moves to +14h after that transition.

There is no strict 9 AM to 5 PM overlap right now, so this pair is better for handoffs, travel planning, or async coordination than for midday meetings.

America/New_York changes from -04:00 (EDT) to -05:00 (EST) on November 1, 2026 at about 1:00 AM.

Reference zones

America/New_York

EDT · -04:00

Asia/Seoul

GMT+9 · +09:00

These are the busiest live references selected from the abbreviation families on this page.

Conversion Table

EST	KST
20:00	09:00
21:00	10:00
22:00	11:00
23:00	12:00
00:00	13:00
01:00	14:00
02:00	15:00
03:00	16:00
04:00	17:00
05:00	18:00
06:00	19:00
07:00	20:00
08:00	21:00
09:00	22:00
10:00	23:00
11:00	00:00
12:00	01:00
13:00	02:00
14:00	03:00
15:00	04:00
16:00	05:00
17:00	06:00
18:00	07:00
19:00	08:00

Top cities using EST

Countries represented here include United States, Canada, and Haiti.

New York CityUnited States TorontoCanada BrooklynUnited States QueensUnited States MontréalCanada PhiladelphiaUnited States Port-au-PrinceHaiti OttawaCanada

Top cities using KST

Countries represented here include South Korea and North Korea.

SeoulSouth Korea BusanSouth Korea PyongyangNorth Korea IncheonSouth Korea DaeguSouth Korea

FAQ

How many hours is KST ahead of EST?: KST is currently +13h relative to EST, using America/New_York and Asia/Seoul as the live reference zones on this page.
What is the best workday overlap between EST and KST?: There is no strict 9-to-5 overlap right now, so one side usually needs an early start or late finish for live meetings.
Does the EST-KST time difference change during DST?: The live gap is +13h right now, based on America/New_York at -04:00 and Asia/Seoul at +09:00. America/New_York changes offset on November 1, 2026, so the gap moves to +14h after that transition.
Which cities commonly use EST and KST?: EST commonly covers cities such as New York City, Toronto, Brooklyn, and Queens, while KST commonly covers cities such as Seoul, Busan, Pyongyang, and Incheon.
Should I use EST/KST or exact IANA zones?: Use the abbreviations for a quick read, but use exact IANA zones such as America/New_York and Asia/Seoul when you need something precise in software, travel plans, or long-range scheduling.

Open Interactive Converter

Related Conversions

EST → PST EST → CST EST → MST EST → GMT EST → UTC EST → IST EST → CET EST → CEST EST → JST EST → AEST EST → AEDT EST → BST

Related planning pages

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Interactive converter

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EST to KST Converter.

EST

KST

Scheduling snapshot

Pair context

Pair details

Calendar and scheduling context

Exact pair identity

Civil calendar differences

Same-offset caution

Jurisdiction evidence

Pair fingerprint

Offset behavior class

DST asymmetry check

Calendar evidence

Day-shift fingerprint

Same-offset and canonical audit

Indexing posture

Same-offset math check

Neighbor audit

Canonical evidence

Local intent behind each abbreviation

KST local intent 1

KST local intent 2

Country calendar contrast

United States

Canada

Haiti

Jamaica

Mexico

South Korea

Neighboring abbreviation checks

From side: EDT

From side: EEST

From side: EET

From side: AEDT

From side: AEST

From side: WIT

To side: GMT+9

To side: JST

To side: PWT

To side: WIT

To side: YAKT

To side: ACDT

Jurisdiction and city roster

Abbreviation identity dossier

From side meaning roster

From side country footprint

From side city anchors

From side jurisdiction dossier

To side meaning roster

To side country footprint

To side city anchors

To side jurisdiction dossier

From side timezone narrative

From side policy and precision notes

From side nearby abbreviations

From side answer profile

To side timezone narrative

To side policy and precision notes

To side nearby abbreviations

To side answer profile

From side country reference summary

To side country reference summary

To side trust note 1

To side trust note 2

Pair identity check

Market coverage on both sides

Digit-roll converter

Common meeting times

EST to KST meeting times

KST to EST meeting times

Operational notes

Popular hour answers

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