World Timezones

Rio de Janeiro to Tehran Converter

Compare Tehran to Rio de Janeiro instead
Rio de Janeiro11:37 pmSun, Jun 7
Rio de JaneiroBRT
Brazil · UTC-3
11:37 pmSun, Jun 7
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
TehranIRST
Iran · UTC+3:30
6:07 amMon, Jun 8
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a
4a
5a

Offset

The time difference between Rio de Janeiro and Tehran is 6.5 hours.

6.5 hours

Rio de Janeiro (BRT) is behind Tehran (IRST).

BRT: UTC-3

IRST: UTC+3:30

Neither Rio de Janeiro nor Tehran is currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–11 AM in Rio de Janeiro (3 PM–5 PM in Tehran).

Both teams are in working hours during this window on weekdays.

Suggested time: 10:00 AM Rio de Janeiro (4:30 PM Tehran).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Brazil

  • New Year's DayThu, Jan 1
  • CarnivalMon, Feb 16
  • CarnivalTue, Feb 17
  • Good FridayFri, Apr 3
  • Easter SundaySun, Apr 5
  • TiradentesTue, Apr 21
  • Labour DayFri, May 1
  • Corpus ChristiThu, Jun 4
  • Independence DayMon, Sep 7
  • Our Lady of AparecidaMon, Oct 12
  • All Souls' DayMon, Nov 2
  • Republic Proclamation DaySun, Nov 15
  • Black Awareness DayFri, Nov 20
  • Christmas DayFri, Dec 25

About these zones

Rio de Janeiro uses Brasilia Time (BRT). To call Brazil, dial +55.

Tehran uses Iran Standard Time (IRST). To call Iran, dial +98.

Tehran is approximately 7,350 miles northeast of Rio de Janeiro.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

Rio de JaneiroTehranDay
12:00 am6:30 amSame day
1:00 am7:30 amSame day
2:00 am8:30 amSame day
3:00 am9:30 amSame day
4:00 am10:30 amSame day
5:00 am11:30 amSame day
6:00 am12:30 pmSame day
7:00 am1:30 pmSame day
8:00 am2:30 pmSame day
9:00 am3:30 pmSame day
10:00 am4:30 pmSame day
11:00 am5:30 pmSame day
12:00 pm6:30 pmSame day
1:00 pm7:30 pmSame day
2:00 pm8:30 pmSame day
3:00 pm9:30 pmSame day
4:00 pm10:30 pmSame day
5:00 pm11:30 pmSame day
6:00 pm12:30 am+1 day
7:00 pm1:30 am+1 day
8:00 pm2:30 am+1 day
9:00 pm3:30 am+1 day
10:00 pm4:30 am+1 day
11:00 pm5:30 am+1 day

Daylight saving time

Neither Rio de Janeiro nor Tehran observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Rio de Janeiro
Sunrise
6:29 AM
Sunset
5:16 PM
Day length
10h 46m
Tehran
Sunrise
4:49 AM
Sunset
7:19 PM
Day length
14h 30m

Cities in these zones

Other cities in Iran Standard Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Brasilia Time

  • CGH
  • GRU
  • GIG
  • SDU
  • CNF
  • BSB
  • CWB
  • GYN
  • POA

Airports in Iran Standard Time

  • IKA
  • THR
  • MHD
  • IFN
  • PYK
  • TBZ

Related conversions

Common conversions

What is 9:00 am Rio de Janeiro in Tehran?
9:00 am Rio de Janeiro is 3:30 pm Tehran.
What is 12:00 pm Rio de Janeiro in Tehran?
12:00 pm Rio de Janeiro is 6:30 pm Tehran.
What is 12:30 pm Rio de Janeiro in Tehran?
12:30 pm Rio de Janeiro is 7:00 pm Tehran.
What is 2:00 pm Rio de Janeiro in Tehran?
2:00 pm Rio de Janeiro is 8:30 pm Tehran.
What is 5:00 pm Rio de Janeiro in Tehran?
5:00 pm Rio de Janeiro is 11:30 pm Tehran.
What is 11:30 pm Rio de Janeiro in Tehran?
11:30 pm Rio de Janeiro is 6:00 am Tehran, the next day.