Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between brt and gmt?
Brasilia Time (brt) is UTC-3 and Greenwich Mean Time (gmt) is UTC+1. The difference between them is 4 hours.
Where is brt used?
Brasilia Time (brt) is used in Brazil and surrounding regions. The IANA timezone identifier is America/Sao_Paulo.
Where is gmt used?
Greenwich Mean Time (gmt) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London.
How do I convert brt to gmt?
Use the interactive converter above. Drag the time slider to any brt time and the gmt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
BRT (São Paulo) is 4 hours behind GMT (London). When BRT (São Paulo) clocks hit noon, GMT (London) reads 16:00.
BRT (São Paulo) observes America/Sao_Paulo and GMT (London) observes Europe/London — a 4 hours gap between them.
Business hours comparison
Every working day, BRT (São Paulo) and GMT (London) are both in business hours for 4 hours simultaneously.
00:0006:0012:0018:0024:00
BRT (São Paulo)
GMT (London)
Overlap (4h)
Optimal meeting slots
BRT (São Paulo) and GMT (London) share 4 hours of business hours overlap daily. Showing the 3 most balanced slots — see the time table below for the full window.
09:00 São Paulo / 13:00 London✓ Both working
10:00 São Paulo / 14:00 London✓ Both working
11:00 São Paulo / 15:00 London✓ Both working
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
BRT (São Paulo)7 holidays
Jul 9Constitutionalist Revolution of 1932
Sep 7Independence Day
Oct 12Our Lady of Aparecida
Nov 2All Souls' Day
Nov 15Republic Proclamation Day
GMT (London)7 holidays
Jun 15World Cup Bank HolidaySOON
Jul 13Battle of the Boyne
Aug 3Summer Bank Holiday
Aug 31Summer Bank Holiday
Nov 30Saint Andrew's Day
Working across BRT (São Paulo) and GMT (London)
Coordinating between BRT (São Paulo) (Brazil) and GMT (London) (United Kingdom) means working around a 4-hour time difference. The 4-hour overlap window gives both teams a natural slot for real-time collaboration without anyone working outside normal hours.
💡 Best practice for cross-timezone meetings
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Schedule at 09:00–10:00 (BRT (São Paulo)) for a 13:00–14:00 slot in GMT (London) — the sweet spot where both teams are working.
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Schedule at 10:00–11:00 (BRT (São Paulo)) for a 14:00–15:00 slot in GMT (London) — the sweet spot where both teams are working.
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Schedule at 11:00–12:00 (BRT (São Paulo)) for a 15:00–16:00 slot in GMT (London) — the sweet spot where both teams are working.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any BRT (São Paulo) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
