No overlap — one side will join outside working hours
KST (Seoul)
HAVANA (Havana)
00:00
11:00-1dWorking
01:00
12:00-1dWorking
02:00
13:00-1dWorking
03:00
14:00-1dWorking
04:00
15:00-1dWorking
05:00
16:00-1dWorking
06:00
17:00-1d
07:00
18:00-1d
08:00
19:00-1d
09:00Working
20:00-1doff
10:00Working
21:00-1doff
11:00Working
22:00-1doff
12:00Working
23:00-1doff
13:00Working
00:00off
14:00Working
01:00off
15:00Working
02:00off
16:00Working
03:00off
17:00
04:00
18:00
05:00
19:00
06:00
20:00
07:00
21:00
08:00
22:00
09:00Working
23:00
10:00Working
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between kst and havana?
Korea Standard Time (kst) is UTC+9 and HAVANA (Havana) (havana) is UTC-4. The difference between them is 13 hours.
Where is kst used?
Korea Standard Time (kst) is used in South Korea and surrounding regions. The IANA timezone identifier is Asia/Seoul.
Where is havana used?
HAVANA (Havana) (havana) is used in Cuba and surrounding regions. The IANA timezone identifier is America/Havana.
How do I convert kst to havana?
Use the interactive converter above. Drag the time slider to any kst time and the havana equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
KST (Seoul) is 13 hours ahead of Havana. At noon in KST (Seoul), your contact in Havana sees 23:00.
KST (Seoul) is in the Asia/Seoul timezone. Havana is in America/Havana. The difference is 13 hours.
Shared working hours
KST (Seoul) and Havana 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 KST (Seoul) and Havana don't share working hours, these are the most practical options available.
05:00 Seoul / 16:00 Havana⚡ One side off-hours
⚠️ 4h before working hours in Seoul
09:00 Seoul / 20:00 Havana⚡ One side off-hours
⚠️ 4h after working hours in Havana
04:00 Seoul / 15:00 Havana⚡ One side off-hours
⚠️ 5h 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.
KST (Seoul)7 holidays
Aug 15Liberation Day
Sep 24Chuseok
Sep 25Chuseok
Sep 26Chuseok
Oct 3National Foundation Day
Havana5 holidays
Jul 25Day before the Commemoration of the Assault of the Moncada garrison
Jul 26Commemoration of the Assault of the Moncada garrison
Jul 27Day after the Commemoration of the Assault of the Moncada garrison
Oct 10Independence Day
Dec 25Christmas Day
Scheduling between KST (Seoul) and Havana
A 13-hour difference separates KST (Seoul) (South Korea) and Havana (Cuba) — wide enough that standard business hours don't align at all. Scheduling requires deliberate compromise from both sides.
💡 Scheduling tips for these locations
⚡
When KST (Seoul) is at 05:00, Havana reads 16:00 — 4h before working hours in Seoul.
⚡
When KST (Seoul) is at 09:00, Havana reads 20:00 — 4h after working hours in Havana.
⚡
When KST (Seoul) is at 04:00, Havana reads 15:00 — 5h 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 KST (Seoul). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.
