JST to BRT Converter & Meeting Planner
Quick answer: 9:00 AM JST = 9:00 PM BRT (fixed +09:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Japan Standard Time (JST) and Brasília Time (BRT)? You need to account for the standard time difference. Brasília Time is normally 12 hours behind Japan Standard Time. Whether you are coordinating between teams in Tokyo and Osaka and São Paulo and Rio de Janeiro, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM JST = 12:00 PM BRT. The full 24-hour JST to BRT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM JST = 3:00 AM BRT.
| JST Time | BRT Time |
|---|---|
| 12:00 AM (00:00) | 12:00 PM (12:00)-1 day |
| 1:00 AM (01:00) | 1:00 PM (13:00)-1 day |
| 2:00 AM (02:00) | 2:00 PM (14:00)-1 day |
| 3:00 AM (03:00) | 3:00 PM (15:00)-1 day |
| 4:00 AM (04:00) | 4:00 PM (16:00)-1 day |
| 5:00 AM (05:00) | 5:00 PM (17:00)-1 day |
| 6:00 AM (06:00) | 6:00 PM (18:00)-1 day |
| 7:00 AM (07:00) | 7:00 PM (19:00)-1 day |
| 8:00 AM (08:00) | 8:00 PM (20:00)-1 day |
| 9:00 AM (09:00) | 9:00 PM (21:00)-1 day |
| 10:00 AM (10:00) | 10:00 PM (22:00)-1 day |
| 11:00 AM (11:00) | 11:00 PM (23:00)-1 day |
| 12:00 PM (12:00) | 12:00 AM (00:00) |
| 1:00 PM (13:00) | 1:00 AM (01:00) |
| 2:00 PM (14:00) | 2:00 AM (02:00) |
| 3:00 PM (15:00) | 3:00 AM (03:00) |
| 4:00 PM (16:00) | 4:00 AM (04:00) |
| 5:00 PM (17:00) | 5:00 AM (05:00) |
| 6:00 PM (18:00) | 6:00 AM (06:00) |
| 7:00 PM (19:00) | 7:00 AM (07:00) |
| 8:00 PM (20:00) | 8:00 AM (08:00) |
| 9:00 PM (21:00) | 9:00 AM (09:00) |
| 10:00 PM (22:00) | 10:00 AM (10:00) |
| 11:00 PM (23:00) | 11:00 AM (11:00) |
Best time to call São Paulo from Tokyo
For most work calls, compare the normal business day in Tokyo (JST) with the business day in São Paulo (BRT). JST commonly covers East Asia, while BRT is mainly associated with South America.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 9:00 PM JST, which reaches 9:00 AM BRT near the start of their workday.
- DST Safety: Neither JST nor BRT uses Daylight Saving Time in our dataset, making business-hour relationships stable year-round.
- Tokyo Stock Exchange (TSE): 09:00-15:00 local time in Tokyo.
- B3 (Brasil Bolsa Balcão): 10:00-17:00 local time in São Paulo.
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Frequently Asked Questions
What is the time difference between JST and BRT?
During standard time, Brasília Time is 12 hours behind Japan Standard Time.
Does Japan observe Daylight Saving Time?
Japan has not observed Daylight Saving Time since 1951, when the practice introduced during the Allied occupation was abolished by the Japanese government. JST has remained fixed at UTC+9:00 ever since, and there is no current legislation to reintroduce DST in Japan.
Is JST the same as Korean Standard Time (KST)?
Yes, South Korea's Korean Standard Time (KST) operates at the same UTC+9:00 offset as JST, and South Korea also does not observe Daylight Saving Time. The two countries share an identical clock year-round, which simplifies scheduling for the significant trade, technology, and cultural exchange between Tokyo and Seoul.
Does Brazil observe Daylight Saving Time?
Brazil officially abolished Daylight Saving Time by presidential decree in April 2019, ending a practice that had been observed in the country's southeastern states since 1985. BRT has remained fixed at UTC-3:00 every day of the year since then, meaning the B3 stock exchange, federal government, and all Brazilian commercial operations run on a permanent, unchanging offset.
Is BRT the same as Argentina Time (ART)?
BRT (Brasília Time) and ART (Argentina Time) share the identical UTC-3:00 offset and neither country observes Daylight Saving Time, making São Paulo and Buenos Aires permanently synchronized on the same clock. Despite the different official designations, a meeting set for 10:00 BRT in São Paulo falls at exactly 10:00 ART in Buenos Aires — a fixed relationship that never shifts seasonally.