BRT to O Converter
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
9:00 am09:00 BRT (UTC-3), Oct 20, 2026 = 10:00 am10:00 O (UTC-2), Oct 20, 2026
BRT is 1 hour behind O.
BRT and O examples
These examples always use BRT (UTC-3) and O (UTC-2). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BRT is 1 hour behind O.
How the time difference changes
BRT is 1 hour behind O year-round.
Working hours of 9:00 am to 6:00 pm in BRT correspond to 10:00 am to 7:00 pm in O.Working hours of 09:00 to 18:00 in BRT correspond to 10:00 to 19:00 in O.
Compare BRT time with O time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Brasilia Time is 1 hour behind Oscar Time Zone.
9:00 am09:00 in BRT is 10:00 am10:00 in O
BRT to O call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in BRT which corresponds to 10am-6pm10:00-18:00 in O
9:00 am09:00 Brasilia Time (BRT). Offset UTC -3:00 hours
10:00 am10:00 Oscar Time Zone (O). Offset UTC -2:00 hours
9:00 am09:00 BRT / 10:00 am10:00 O
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| BRT | O |
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Brasilia Time
Offset: BRT is 3 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Brazil
Principal Cities: The largest city in the BRT time zone is São Paulo in Brazil, with about 12.4 million people. Other major cities in this time zone include Rio de Janeiro, Belo Horizonte, Salvador, Fortaleza.
Daylight Saving: Clocks in Brasilia Time (BRT) do not change for daylight saving time, so BRT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
BRT representations, usage and related time zones
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the west of the zero meridian.
- Papa - Military abbreviation for BRT
- P - short form of 'Papa'
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard Time
- AMST - Amazon Summer Time
- ART - Argentina Time
- BRT - Brasilia Time
- CLST - Chile Summer Time
- FKST - Falkland Islands Summer Time
- FKT - Falkland Islands Time
- GFT - French Guiana Time
- P - Papa Time Zone
- PYST - Paraguay Summer Time
- PYT - Paraguay Time
- SRT - Suriname Time
- UYT - Uruguay Time
Oscar Time Zone
Offset: O is 2 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Brazil, Greenland, Saint Pierre and Miquelon, South Georgia and the South Sandwich Islands
Principal Cities: The largest city in the O time zone is Nuuk in Greenland, with about 14,798 people. Other major cities in this time zone include Saint-Pierre, Sisimiut, Ilulissat, Qaqortoq.
Daylight Saving: Some places on Oscar Time Zone (O) keep the same time all year, while others use O for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today some of the lighter areas are on UTC−1.
O representations, usage and related time zones
- -02 - basic short
- -0200 - basic
- -02:00 - extended
- -0200 - sign character (-) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates an offset of two hours to the west of the zero meridian.
- Oscar - Military abbreviation for O
- O - short form of 'Oscar'
- PMDT - Pierre & Miquelon Daylight Time
- WGT - West Greenland Time
- BRST - Brasilia Summer Time
- FNT - Fernando de Noronha Time
- O - Oscar Time Zone
- UYST - Uruguay Summer Time