No overlap — one side will join outside working hours
MDT (Denver)
KST (Seoul)
00:00
15:00Working
01:00
16:00Working
02:00
17:00
03:00
18:00
04:00
19:00
05:00
20:00
06:00
21:00
07:00
22:00
08:00
23:00
09:00Working
00:00+1doff
10:00Working
01:00+1doff
11:00Working
02:00+1doff
12:00Working
03:00+1doff
13:00Working
04:00+1doff
14:00Working
05:00+1doff
15:00Working
06:00+1doff
16:00Working
07:00+1doff
17:00
08:00+1d
18:00
09:00+1dWorking
19:00
10:00+1dWorking
20:00
11:00+1dWorking
21:00
12:00+1dWorking
22:00
13:00+1dWorking
23:00
14:00+1dWorking
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between mdt and kst?
Mountain Daylight Time (mdt) is UTC-6 and Korea Standard Time (kst) is UTC+9. The difference between them is 15 hours.
Where is mdt used?
Mountain Daylight Time (mdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
Where is kst used?
Korea Standard Time (kst) is used in South Korea and surrounding regions. The IANA timezone identifier is Asia/Seoul.
How do I convert mdt to kst?
Use the interactive converter above. Drag the time slider to any mdt time and the kst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
MDT (Denver) is 15 hours behind KST (Seoul). At noon in MDT (Denver), your contact in KST (Seoul) sees 03:00.
MDT (Denver) is in the America/Denver timezone. KST (Seoul) is in Asia/Seoul. The difference is 15 hours.
Business hours comparison
MDT (Denver) and KST (Seoul) have no shared working hours under a standard 9:00–17:00 schedule. One side will always need to join at an off-hour.
Recommended meeting windows
Since MDT (Denver) and KST (Seoul) don't share working hours, these are the most practical options available.
16:00 Denver / 07:00 Seoul⚡ One side off-hours
⚠️ 2h before working hours in Seoul
18:00 Denver / 09:00 Seoul⚡ One side off-hours
⚠️ 2h after working hours in Denver
15:00 Denver / 06:00 Seoul⚡ One side off-hours
⚠️ 3h before working hours in Seoul
Based on standard 09:00–17:00 working hours in each location's local time.
Public holidays for both locations
⚡ Holiday alerts for both locations, double-check schedules before confirming.
MDT (Denver)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
KST (Seoul)7 holidays
Aug 15Liberation Day
Sep 24Chuseok
Sep 25Chuseok
Sep 26Chuseok
Oct 3National Foundation Day
Scheduling between MDT (Denver) and KST (Seoul)
Teams in MDT (Denver) (USA) and KST (Seoul) (South Korea) deal with a 15-hour gap that pushes their working days apart. Real-time meetings always require someone to stretch outside the standard 9–5.
💡 Scheduling tips for these locations
⚡
When MDT (Denver) is at 16:00, KST (Seoul) reads 07:00 — 2h before working hours in Seoul.
⚡
When MDT (Denver) is at 18:00, KST (Seoul) reads 09:00 — 2h after working hours in Denver.
⚡
When MDT (Denver) is at 15:00, KST (Seoul) reads 06:00 — 3h before working hours in Seoul.
With no shared business hours, these slots distribute the scheduling burden as evenly as possible between both locations.
DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.
Use the time slider above to find the exact equivalent time for any moment in MDT (Denver). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.
