BRT to HST Converter
Convert time between Brasilia Time (BRT) and Hawaii Standard Time (HST)
Brasilia Time (BRT)
Hawaii Standard Time (HST)
Time Difference
Hawaii Standard Time (HST) is 0 hours ahead of Brasilia Time (BRT)
Select Date
Select Time
Quick Reference
| BRT | HST |
|---|---|
| 23:00 | 16:00 |
| 01:00 | 18:00 |
| 03:00 | 20:00 |
| 05:00 | 22:00 |
| 07:00 | 00:00 |
| 09:00 | 02:00 |
| 11:00 | 04:00 |
| 13:00 | 06:00 |
| 15:00 | 08:00 |
| 17:00 | 10:00 |
| 19:00 | 12:00 |
| 21:00 | 14:00 |
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 BRT to HST Time Conversion
Converting between Brasilia Time (BRT) and Hawaii Standard Time (HST) connects Brazil with the Hawaiian Islands and parts of French Polynesia. BRT is UTC-3 and HST is UTC-10, putting Honolulu, Hilo and Papeete 7 hours behind Sao Paulo, Rio de Janeiro and Brasilia.
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 BRT and HST is constant year-round.
Common Use Cases for BRT to HST Conversion
Business & Work
- Coordinating tourism and hospitality calls between Brazilian and Hawaiian operators
- Scheduling Pacific research collaborations between Brazilian and Hawaii-based institutions
- Aligning logistics handovers across the Americas to the central Pacific
Personal & Travel
- Planning travel between Brazil and the Hawaiian Islands
- Coordinating with family or friends in Honolulu, Maui or Tahiti
- Scheduling video calls during the Hawaiian morning
Time Zone Information
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
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
Quick Reference: BRT to HST
Remember: HST is always 7 hours behind BRT
Frequently Asked Questions
What is the time difference between BRT and HST?
Brasilia Time (BRT) is UTC-3, and Hawaii Standard Time (HST) is UTC-10. HST is 7 hours behind BRT. When it is 12:00 PM in Brasilia, it is 5:00 AM in Honolulu.
Does the BRT-HST offset change throughout the year?
No. Hawaii never observes DST, and Brazil ended DST in 2019. The 7-hour gap between BRT and HST is constant year-round.
Does Brazil observe daylight saving time?
No. Brazil abolished DST in 2019, so BRT remains at UTC-3 throughout the year.
What are the best times for BRT-HST business calls?
Overlap is tight. 4:00 to 6:00 PM BRT corresponds to 9:00 to 11:00 AM HST — late afternoon in Brazil, mid-morning in Hawaii. Avoid scheduling before 8:00 AM HST (3:00 PM BRT) or after 5:00 PM HST (12:00 AM BRT).
Which countries/regions use HST timezone?
HST covers the US state of Hawaii (Honolulu, Hilo, Kahului) year-round. French Polynesia (Tahiti, Papeete) shares the same UTC-10 offset and is sometimes referred to as TAHT.
Which countries/regions use BRT timezone?
BRT is observed across most of Brazil, including Brasilia, Sao Paulo, Rio de Janeiro, Belo Horizonte and Salvador. Some western states use AMT (UTC-4) instead.
Pro Tips
- • HST is 7 hours behind BRT — subtract 7 hours from a Brasilia time to get the Honolulu time.
- • Best meeting window: 4:00 to 6:00 PM BRT = 9:00 to 11:00 AM HST — late afternoon in Brazil, mid-morning in Hawaii.
- • Neither side observes DST, so the 7-hour gap is stable year-round — no need to update recurring meetings seasonally.
- • Hawaii follows a relaxed business pace; calls before 9:00 AM HST may not be welcomed.
- • Use IANA identifiers (America/Sao_Paulo and Pacific/Honolulu) in calendars to keep meetings unambiguous.
- • The Aleutian Islands of Alaska are also on UTC-10 (HST) in winter but switch to HDT (UTC-9) in summer; mainland Hawaii stays put.