Offset
The time difference between Greenwich Mean Time and Porto Alegre is 4 hours.
Greenwich Mean Time (BST) is ahead of Porto Alegre (BRT).
BST: UTC+1
BRT: UTC-3
Greenwich Mean Time is currently observing daylight saving time; Porto Alegre is not.
When to schedule
Business-hours overlap: 1 PM–5 PM in Greenwich Mean Time (9 AM–1 PM in Porto Alegre).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Greenwich Mean Time (11:00 AM Porto Alegre).
This window may shift by an hour during daylight saving time.
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.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
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
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Porto Alegre uses Brasilia Time (BRT). To call Brazil, dial +55.
Porto Alegre is approximately 6,450 miles southwest of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | Porto Alegre | Day |
|---|---|---|
| 12:00 am | 8:00 pm | -1 day |
| 1:00 am | 9:00 pm | -1 day |
| 2:00 am | 10:00 pm | -1 day |
| 3:00 am | 11:00 pm | -1 day |
| 4:00 am | 12:00 am | Same day |
| 5:00 am | 1:00 am | Same day |
| 6:00 am | 2:00 am | Same day |
| 7:00 am | 3:00 am | Same day |
| 8:00 am | 4:00 am | Same day |
| 9:00 am | 5:00 am | Same day |
| 10:00 am | 6:00 am | Same day |
| 11:00 am | 7:00 am | Same day |
| 12:00 pm | 8:00 am | Same day |
| 1:00 pm | 9:00 am | Same day |
| 2:00 pm | 10:00 am | Same day |
| 3:00 pm | 11:00 am | Same day |
| 4:00 pm | 12:00 pm | Same day |
| 5:00 pm | 1:00 pm | Same day |
| 6:00 pm | 2:00 pm | Same day |
| 7:00 pm | 3:00 pm | Same day |
| 8:00 pm | 4:00 pm | Same day |
| 9:00 pm | 5:00 pm | Same day |
| 10:00 pm | 6:00 pm | Same day |
| 11:00 pm | 7:00 pm | Same day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; Porto Alegre does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:12 AM
- Sunset
- 9:04 PM
- Day length
- 15h 52m
- Sunrise
- 7:17 AM
- Sunset
- 5:47 PM
- Day length
- 10h 31m
Daylight overlap: 9h 47m — 11:17 AM–9:04 PM in Greenwich Mean Time (7:17 AM–5:04 PM in Porto Alegre). Both locations are in daylight during this window.
Cities in these zones
Cities in Greenwich Mean Time
Other cities in Brasilia Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in Brasilia Time
- CGH
- GRU
- GIG
- SDU
- CNF
- BSB
- CWB
- GYN
- POA
Related conversions
Common conversions
- What is 9:00 am GMT in Porto Alegre?
- 9:00 am GMT is 5:00 am Porto Alegre.
- What is 12:00 pm GMT in Porto Alegre?
- 12:00 pm GMT is 8:00 am Porto Alegre.
- What is 12:30 pm GMT in Porto Alegre?
- 12:30 pm GMT is 8:30 am Porto Alegre.
- What is 2:00 pm GMT in Porto Alegre?
- 2:00 pm GMT is 10:00 am Porto Alegre.
- What is 5:00 pm GMT in Porto Alegre?
- 5:00 pm GMT is 1:00 pm Porto Alegre.
- What is 11:30 pm GMT in Porto Alegre?
- 11:30 pm GMT is 7:30 pm Porto Alegre.