Smart hours to call Guinea-Bissau (+245)
Guinea-Bissau runs on Greenwich Mean Time — UTC+0 year-round. Trade and NGO contacts in Bissau are reachable 8 AM–4 PM GMT.
GMT (UTC+0), at a glance.
Guinea-Bissau observes Greenwich Mean Time all year with no daylight saving. Bissau and Bafatá share UTC+0.
Guinea-Bissau against the world's hubs.
Guinea-Bissau is in sync with London and Lisbon in winter, 1 h behind Paris, and 5 h ahead of New York. Portuguese-speaking callers overlap fully with Bissau's business hours.
Understanding the time difference between the United States and Guinea-Bissau
Time zone differences across other major countries
Why timing matters for calls to Guinea-Bissau.
Cashew procurement contacts and development agency representatives in Bissau keep short office hours. The 8–10 AM window catches teams before midday heat and afternoon network congestion.
The best windows to reach Guinea-Bissau.
8 AM–11 AM GMT for trade and NGO contacts. Friday afternoons are largely inaccessible due to Islamic observance. Target Sunday–Thursday mornings.
Guinea-Bissau runs at UTC
The zone is Africa/Bissau. Every window on this page is worked out from that offset rather than a rule of thumb, so the times shown are the ones that actually apply to Guinea-Bissau.
No daylight saving
Guinea-Bissau stays on UTC all year. The windows below only move when the caller's own country changes its clocks, not when Guinea-Bissau does.
Shared hours with 3 of 5 markets
Callers in New York, London, Mumbai share part of the working day with Guinea-Bissau. The table above gives the exact intersection for each.
Where the gap is too wide
There is no 9-to-5 overlap with Los Angeles, Sydney. Calling Guinea-Bissau from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call Guinea-Bissau using the +245 code.
Dial +245 then the seven-digit local number. Ringflow routes via West African carrier infrastructure for consistent quality to Bissau.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +245
Guinea-Bissau's international code. Every call to Guinea-Bissau must start with +245.
Area prefix
Add the local area or mobile network code — always drop any leading zero used for domestic calls.
Full number
Dial the remaining subscriber digits. Your number is now correctly formatted for international routing.
Best time to call — every country.
Jump to any country's best-time-to-call guide. Search by name, ISO or dial prefix.
Reach Guinea-Bissau contacts in their window, on the right network.
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When your working day overlaps Guinea-Bissau
Callers in New York, London and Mumbai share part of the working day with Guinea-Bissau. There is no shared working window with Los Angeles and Sydney.
| Calling from | Guinea-Bissau is | Call at (your time) | Which is (their time) |
|---|---|---|---|
| New York | 5h ahead | 9:00 AM – 12:00 PM | 2:00 PM – 5:00 PM |
| Los Angeles | 8h ahead | No shared working hours — you would need to call outside 9am-5pm | |
| London | same time | 9:00 AM – 5:00 PM | 9:00 AM – 5:00 PM |
| Mumbai | 5h 30m behind | 2:30 PM – 5:00 PM | 9:00 AM – 11:30 AM |
| Sydney | 11h behind | No shared working hours — you would need to call outside 9am-5pm | |
Windows are the intersection of a 9am-5pm working day in each place, using Guinea-Bissau'sstandard-time offset of UTC. Guinea-Bissau does not observe daylight saving, so these windows hold all year — though they shift when the caller's own country changes its clocks.
FAQ
Calling Guinea-Bissau, answered.
Time zone, daylight saving and dialling questions for Guinea-Bissau (+245).