Convert Iran Standard Time to Brasília Time
Instantly convert Iran Standard Time (IRST) to Brasília Time (BRT) with our free online calculator.
Iran Standard Time
08:50:59 AM
Wed, Jun 24 (IRST)
Brasília Time
02:20:59 AM
Wed, Jun 24 (BRT)
Convert a Specific Time
24-Hour Comparison
| IRST | BRT |
|---|---|
| 12:00 AM | 5.5:00 PM(-1d) |
| 1:00 AM | 6.5:00 PM(-1d) |
| 2:00 AM | 7.5:00 PM(-1d) |
| 3:00 AM | 8.5:00 PM(-1d) |
| 4:00 AM | 9.5:00 PM(-1d) |
| 5:00 AM | 10.5:00 PM(-1d) |
| 6:00 AM | 11.5:00 PM(-1d) |
| 7:00 AM | 0.5:00 AM |
| 8:00 AM | 1.5:00 AM |
| 9:00 AM | 2.5:00 AM |
| 10:00 AM | 3.5:00 AM |
| 11:00 AM | 4.5:00 AM |
| 12:00 PM | 5.5:00 AM |
| 1:00 PM | 6.5:00 AM |
| 2:00 PM | 7.5:00 AM |
| 3:00 PM | 8.5:00 AM |
| 4:00 PM | 9.5:00 AM |
| 5:00 PM | 10.5:00 AM |
| 6:00 PM | 11.5:00 AM |
| 7:00 PM | 0.5:00 PM |
| 8:00 PM | 1.5:00 PM |
| 9:00 PM | 2.5:00 PM |
| 10:00 PM | 3.5:00 PM |
| 11:00 PM | 4.5:00 PM |
How to Convert Iran Standard Time to Brasília Time
Formula
To convert Iran Standard Time (IRST) to Brasília Time (BRT): Convert IRST to BRT
About Iran Standard Time (IRST)
Iran Standard Time (IRST, IANA: Asia/Tehran) is the civil time of the Islamic Republic of Iran, set at UTC+3:30 — one of the world's few 30-minute-offset time zones. IRST observes Daylight Saving Time (switching to IRDT = UTC+4:30) from the last Wednesday of the Iranian month of Farvardin (~March 22) to the last Wednesday of Shahrivar (~September 22) per Iranian government calendar (the country abolished DST in 2022 then partially reinstated it for energy savings — the schedule is subject to change by Iranian Parliament Majlis decree). The 30-minute offset is preserved because Iran's central meridian is approximately 52.5°E, between UTC+3 and UTC+4 standard zones, and the Iranian Solar Hijri calendar has its own astronomical traditions for time-keeping. IRST serves approximately 88 million Iranian people across 31 provinces. Major cities: Tehran (8.7M city, 13M metro — capital), Mashhad (3.1M), Isfahan (2.2M), Karaj (1.6M), Shiraz (1.6M), Tabriz (1.6M), Qom (1.2M). Other 30/45-minute offset zones: India (UTC+5:30), Nepal (UTC+5:45), Myanmar (UTC+6:30), Newfoundland (UTC-3:30), Afghanistan (UTC+4:30), Marquesas (UTC-9:30). Affects: Tehran Stock Exchange (TSE) trading, Iranian Solar Hijri New Year Nowruz celebrations.
About Brasília Time (BRT)
Brasília Time (BRT, IANA: America/Sao_Paulo) is the official civil time of Brazil's most populous regions, set at UTC-3:00 — named after the federal capital city of Brasília. BRT serves approximately 175 million people across 23 of Brazil's 26 states + Federal District including the megacities São Paulo (12M), Rio de Janeiro (6.7M), Salvador (2.9M), Fortaleza (2.7M), Belo Horizonte (2.5M), Brasília (3.1M), Curitiba (1.9M). Brazil abolished Daylight Saving Time in 2019 by Presidential Decree 9772/2019 (citing minimal energy savings and disruption costs), so BRT is observed year-round without seasonal change since then. Acre State and a small portion of Amazonas use Acre Time (ACT = UTC-5:00); the remainder of Amazonas plus Mato Grosso/Mato Grosso do Sul/Rondônia use Amazon Time (AMT = UTC-4:00); the Fernando de Noronha archipelago uses UTC-2:00. BRT affects: B3 (São Paulo Stock Exchange) trading hours, Brazilian football Série A match scheduling, and Petrobras / Vale international corporate-call timing.