Korea Standard Time
KST means UTC+09:00 throughout the year.
TIME ZONE CONVERTER
KST to ET
Time Converter
Convert Korea Standard Time to Eastern Time. Compare dates, seasonal differences and meeting hours.
KST is 13h or 14h ahead of ET in 2026, depending on the date.
9 AM KST = 7 PM ET Mon, 9 Nov at the destination
Selected date: November 10, 2026. Fixed abbreviations retain their stated UTC offsets.
THE QUICK REFERENCE
CSVKST to ET conversion table
November 10, 2026 · Date changes are marked.
View the full 24-hour table
| KST | ET |
|---|---|
| 12:00 AM | 10:00 AM -1 day |
| 1:00 AM | 11:00 AM -1 day |
| 2:00 AM | 12:00 PM -1 day |
| 3:00 AM | 1:00 PM -1 day |
| 4:00 AM | 2:00 PM -1 day |
| 5:00 AM | 3:00 PM -1 day |
| 6:00 AM | 4:00 PM -1 day |
| 7:00 AM | 5:00 PM -1 day |
| 8:00 AM | 6:00 PM -1 day |
| 9:00 AM | 7:00 PM -1 day |
| 10:00 AM | 8:00 PM -1 day |
| 11:00 AM | 9:00 PM -1 day |
| KST | ET |
|---|---|
| 12:00 PM | 10:00 PM -1 day |
| 1:00 PM | 11:00 PM -1 day |
| 2:00 PM | 12:00 AM |
| 3:00 PM | 1:00 AM |
| 4:00 PM | 2:00 AM |
| 5:00 PM | 3:00 AM |
| 6:00 PM | 4:00 AM |
| 7:00 PM | 5:00 AM |
| 8:00 PM | 6:00 AM |
| 9:00 PM | 7:00 AM |
| 10:00 PM | 8:00 AM |
| 11:00 PM | 9:00 AM |
Starting with the ET working day
These examples start on 2026-11-10 in ET.
09:00 ET23:00 →KST · 2026-11-10
17:00 ET07:00 →KST · 2026-11-11
Which time-zone meaning are we using?
Eastern Time
ET follows America/New_York. On your selected date it uses UTC−05:00 (EST). Its offset can change when the regional clock rules change.
Fixed alternatives: EST (UTC−05:00) · EDT (UTC−04:00). These labels keep their stated UTC offset throughout the year.
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 KST to ET throughout 2026
Keeping 09:00 on the KST clock produces 2 different destination clock/date answers in 2026. The ranges below use KST calendar dates, including transition days.
| Dates in KST · 2026 | ET answer | Source → destination offsets | Explore |
|---|---|---|---|
| Jan 1 – Mar 867 dates | 19:00Previous day | UTC+09:00 → UTC−05:00 | |
| Mar 9 – Nov 1238 dates | 20:00Previous day | UTC+09:00 → UTC−04:00 | |
| Nov 2 – Dec 3160 dates | 19:00Previous day | UTC+09:00 → UTC−05:00 |
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does KST time become a different date in ET?
Your complete source day: 2026-11-10. Each range shows which destination date to use.
KST · 2026-11-1000:00–14:00UTC+09:00
ET · 2026-11-0910:00–24:00UTC−05:00 Previous day
KST · 2026-11-1014:00–24:00UTC+09:00
ET · 2026-11-1000:00–10:00UTC−05:00 Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026A year of time differences.
How ET compares with KST throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−14h
−13h
−14h
ET changes its UTC offset in 2026. KST is a fixed offset.
See exact change periods
| From (UTC, inclusive) | Until (UTC, exclusive) | ET vs KST |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 8 Mar 2026, 07:00 UTC | 14h behind |
| 8 Mar 2026, 07:00 UTC | 1 Nov 2026, 06:00 UTC | 13h behind |
| 1 Nov 2026, 06:00 UTC | 1 Jan 2027, 00:00 UTC | 14h behind |
CLOCK CHANGES
What changes at the next clock adjustment?
Exact periods outside the most common difference in 2026
The most frequent difference has ET 13h behind relative to KST. Exceptions:
| From (UTC, inclusive) | Until (UTC, exclusive) | Compared with KST |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 8 Mar 2026, 07:00 UTC | 14h behind |
| 1 Nov 2026, 06:00 UTC | 1 Jan 2027, 00:00 UTC | 14h behind |
PLAN BEYOND A SINGLE DAY
Daily CSVKST–ET working hours through 2026
Every date calculated with your working windows. 261 selected KST workdays; public holidays are not applied.
Least shared time0h
Most common0h
Most shared time0h
Days without a 60-min slot261 / 261
One fixed start time does not fit every working day.
Your working windows never overlap on the selected host workdays this year. Adjust working days, hours or duration above, or use different seasonal meeting times.
KST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. ET: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
THE DETAILS THAT MATTER
KST to ET: useful answers
Why is the KST to ET difference sometimes 13 hours and sometimes 14 hours?
KST is 13h or 14h ahead of ET in 2026, depending on the date. ET changes its UTC offset in 2026. KST is a fixed offset.
Does the KST–ET time difference change in 2026?
The published rules produce 3 periods with 2 different offsets in 2026. See the annual chart for the exact boundaries of each period.
Does this conversion change the calendar date?
09:00 in KST on 2026-11-10 is 19:00 in ET on 2026-11-09. Use the destination date when adding the meeting to a calendar.
Can KST and ET meet during working hours?
Your selected working windows have no shared time on 2026-11-10. The planner shows alternatives and how many minutes fall outside each person's working hours. Try another date or adjust the windows.
Related time-zone meanings and conversions
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology