HST to BRT Converter
Convert time between Hawaii Standard Time (HST) and Brasilia Time (BRT)
Hawaii Standard Time (HST)
Brasilia Time (BRT)
Time Difference
Brasilia Time (BRT) is 0 hours ahead of Hawaii Standard Time (HST)
Select Date
Select Time
Quick Reference
| HST | BRT |
|---|---|
| 16:00 | 23:00 |
| 18:00 | 01:00 |
| 20:00 | 03:00 |
| 22:00 | 05:00 |
| 00:00 | 07:00 |
| 02:00 | 09:00 |
| 04:00 | 11:00 |
| 06:00 | 13:00 |
| 08:00 | 15:00 |
| 10:00 | 17:00 |
| 12:00 | 19:00 |
| 14:00 | 21:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About HST to BRT Time Conversion
Converting between Hawaii Standard Time (HST) and Brasilia Time (BRT) connects the Hawaiian Islands and parts of French Polynesia with Brazil. HST is UTC-10 and BRT is UTC-3, putting Sao Paulo, Rio de Janeiro and Brasilia 7 hours ahead of Honolulu, Hilo and Papeete.
This converter uses the IANA timezone database for accurate calculations. Hawaii does not observe daylight saving time, and Brazil abolished DST in 2019, so the 7-hour gap between HST and BRT is constant year-round.
Common Use Cases for HST to BRT Conversion
Business & Work
- Coordinating tourism and hospitality calls between Hawaiian and Brazilian operators
- Scheduling Pacific research collaborations between Hawaii-based and Brazilian institutions
- Aligning logistics handovers from the central Pacific across the Americas
Personal & Travel
- Planning travel between the Hawaiian Islands and Brazil
- Coordinating with family or friends in Sao Paulo, Rio de Janeiro or Brasilia
- Scheduling video calls during the Hawaiian morning
Time Zone Information
Hawaii Standard Time (HST)
- UTC Offset: UTC-10
- IANA Timezone: Pacific/Honolulu
- Daylight Saving: Not observed
- Major Cities: Honolulu, Hilo, Kahului, Kailua, Papeete (Tahiti)
- Coverage: US state of Hawaii year-round; French Polynesia (Tahiti) shares the same offset
Brasilia Time (BRT)
- UTC Offset: UTC-3
- IANA Timezone: America/Sao_Paulo
- Daylight Saving: Not observed (DST abolished in Brazil in 2019)
- Major Cities: Brasilia, Sao Paulo, Rio de Janeiro, Belo Horizonte, Salvador
- Coverage: Most of Brazil including the southeast, south, northeast and central-west regions
Quick Reference: HST to BRT
Remember: BRT is always 7 hours ahead of HST
Frequently Asked Questions
What is the time difference between HST and BRT?
Hawaii Standard Time (HST) is UTC-10, and Brasilia Time (BRT) is UTC-3. BRT is 7 hours ahead of HST. When it is 12:00 PM in Honolulu, it is 7:00 PM in Brasilia.
Do Hawaii or Brazil observe daylight saving time?
No. Hawaii does not observe DST, and Brazil abolished DST in 2019. The 7-hour offset between HST and BRT is fixed year-round.
How does the time difference change throughout the year?
It does not. With neither side observing DST, the gap stays at 7 hours every day of the year — one of the most predictable cross-region conversions.
What are the best times for HST-BRT business calls?
A 7-hour gap leaves a narrow shared window. A late Hawaiian morning (10:00 to 11:00 AM HST) maps to a Brazilian late afternoon (5:00 to 6:00 PM BRT). For end-of-day handovers, schedule around 1:00 to 2:00 PM HST, which is 8:00 to 9:00 PM BRT.
Which countries/regions use BRT timezone?
BRT is observed across most of Brazil, including Brasilia, Sao Paulo, Rio de Janeiro, Belo Horizonte and Salvador. A few western Brazilian states use AMT (UTC-4) instead.
Which countries/regions use HST timezone?
HST covers the US state of Hawaii year-round. French Polynesia (Tahiti) shares the same UTC-10 offset. Major cities include Honolulu, Hilo, Kahului, Kailua and Papeete.
Pro Tips
- • BRT is always 7 hours ahead of HST — add 7 hours to a Honolulu time to get the Brasilia time.
- • Neither Hawaii nor Brazil observes DST, so this conversion is the same all year.
- • Use IANA identifiers (Pacific/Honolulu and America/Sao_Paulo) in calendars; the lack of DST means the offset is stable.
- • Hawaiian morning maps to Brazilian late afternoon — the cleanest joint window for short calls.
- • A Hawaiian late afternoon (4:00 PM HST) is already 11:00 PM in Brazil, so save longer meetings for earlier in the Hawaiian day.
- • For broadcasts of Brazilian sports or events, expect them in the Hawaiian morning rather than the evening.