No overlap — one side will join outside working hours
KST (Seoul)
BRT (São Paulo)
00:00
12:00-1dWorking
01:00
13:00-1dWorking
02:00
14:00-1dWorking
03:00
15:00-1dWorking
04:00
16:00-1dWorking
05:00
17:00-1d
06:00
18:00-1d
07:00
19:00-1d
08:00
20:00-1d
09:00Working
21:00-1doff
10:00Working
22:00-1doff
11:00Working
23:00-1doff
12:00Working
00:00off
13:00Working
01:00off
14:00Working
02:00off
15:00Working
03:00off
16:00Working
04:00off
17:00
05:00
18:00
06:00
19:00
07:00
20:00
08:00
21:00
09:00Working
22:00
10:00Working
23:00
11:00Working
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between kst and brt?
Korea Standard Time (kst) is UTC+9 and Brasilia Time (brt) is UTC-3. The difference between them is 12 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 brt used?
Brasilia Time (brt) is used in Brazil and surrounding regions. The IANA timezone identifier is America/Sao_Paulo.
How do I convert kst to brt?
Use the interactive converter above. Drag the time slider to any kst time and the brt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
How far apart are KST (Seoul) and BRT (São Paulo)?
KST (Seoul) is 12 hours ahead of BRT (São Paulo). When KST (Seoul) clocks hit noon, BRT (São Paulo) reads 00:00.
KST (Seoul) observes Asia/Seoul and BRT (São Paulo) observes America/Sao_Paulo — a 12 hours gap between them.
Daily overlap window
When KST (Seoul) is in standard working hours, BRT (São Paulo) is not — and vice versa. There is no mutual business window between these two locations.
Optimal meeting slots
No business hours overlap exists between KST (Seoul) and BRT (São Paulo). Showing the most balanced options with minimal inconvenience for both locations.
04:00 Seoul / 16:00 São Paulo⚡ One side off-hours
⚠️ 5h before working hours in Seoul
09:00 Seoul / 21:00 São Paulo⚡ One side off-hours
⚠️ 5h after working hours in São Paulo
16:00 Seoul / 04:00 São Paulo⚡ One side off-hours
⚠️ 5h before working hours in São Paulo
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
KST (Seoul)7 holidays
Aug 15Liberation Day
Sep 24Chuseok
Sep 25Chuseok
Sep 26Chuseok
Oct 3National Foundation Day
BRT (São Paulo)7 holidays
Jul 9Constitutionalist Revolution of 1932SOON
Sep 7Independence Day
Oct 12Our Lady of Aparecida
Nov 2All Souls' Day
Nov 15Republic Proclamation Day
Working across KST (Seoul) and BRT (São Paulo)
Coordinating between KST (Seoul) (South Korea) and BRT (São Paulo) (Brazil) means working around a 12-hour time difference. Since standard business hours don't naturally overlap, meetings usually require one side to shift slightly outside their normal working day.
💡 Best practice for cross-timezone meetings
⚡
04:00–05:00 in KST (Seoul) corresponds to 16:00–17:00 in BRT (São Paulo) (5h before working hours in Seoul).
⚡
09:00–10:00 in KST (Seoul) corresponds to 21:00–22:00 in BRT (São Paulo) (5h after working hours in São Paulo).
⚡
16:00–17:00 in KST (Seoul) corresponds to 04:00–05:00 in BRT (São Paulo) (5h before working hours in São Paulo).
Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any KST (Seoul) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
