International calling guide
Guinea-Bissau runs on GMT (UTC+0) year-round. Business operates Monday–Friday, 8 AM–4 PM in Bissau. Best window: 8–10 AM GMT on a Monday or Tuesday.
Guinea-Bissau
+245 · UTC
Local Time Now
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See the live time gap between a global reference city and Guinea-Bissau at a glance no calculator needed.
Reference
New Delhi Time Now
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Destination
Bissau, Guinea-Bissau Time Now
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Guinea-Bissau runs on GMT year-round. Portuguese is the official language — one of only a few GMT-zone Portuguese-speaking countries.
Pro tip: Call 8–10 AM GMT on a Monday or Tuesday.
Guinea-Bissau uses GMT (UTC+0) permanently. No DST. Aligns with Senegal, Guinea, and Sierra Leone.
Business hours in Bissau run 8 AM–4 PM Monday–Friday. Infrastructure challenges mean connectivity can be unpredictable.
Portuguese is the official language alongside Creole. Outreach in Portuguese is the most effective approach.
Independence Day on September 24 is the most important national holiday. Plan outreach away from this date.
The time differences range from 8 hours ahead of UTC to 5 hours behind UTC, showcasing the diverse time zones across the globe.
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The right window doubles your answer rate. The wrong one sends you straight to voicemail.
Avoid
Call on Friday (Muslim-majority country)
Best Window
Mon–Tue, 9–11 AM GMT
Avoid
Ring on Independence Day (Sep 24)
Best Window
Mid-week, confirmed workday
Avoid
Cold call without prior arrangement
Best Window
Scheduled, pre-announced call
Avoid
Call after 4 PM (Bissau close)
Best Window
9–11 AM GMT, Mon or Tue
Smart timing isn't just courtesy it directly drives better outcomes for every call you make.
Morning calls (8–10 AM GMT) on Mon–Tue in Bissau double pickup vs. Friday afternoon dials.
2×
more pickups
Pre-arranging calls shows awareness of Guinea-Bissau's small and relationship-oriented economy.
+38%
connect rate
Confirmed calls see 4× more engagement than cold unannounced dials in Guinea-Bissau.
4×
engagement
Calling during Independence Day or Eid sends 90% of Guinea-Bissau calls to voicemail.
−90%
voicemail drops
Use these resources to plan every international call with confidence.
Set reminders and plan calls in advance so you never miss the optimal window.
Leverage automated analytics to identify the best call timing for every contact.
Instantly translate your local time to the recipient's timezone before dialling.
Professional outreach with automated scheduling features built into your CRM.
Four simple steps for every international call to Guinea-Bissau dial it right, every time.
Press "+" on mobile or "00" from most landlines. This opens an international line.
Guinea-Bissau's international code. Every call to Guinea-Bissau must start with +245.
Add the local area or mobile network code — always drop any leading zero used for domestic calls.
Dial the remaining subscriber digits. Your number is now correctly formatted for international routing.
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Everything you need to know about timing, time zones, and dialing Guinea-Bissau (+245). Still have a question? Our wholesale team is one click away.
Monday–Tuesday, 9–11 AM GMT (UTC+0). Guinea-Bissau uses GMT year-round. The work week is Monday–Friday, though Friday is quieter. Business operates 8 AM–4 PM in Bissau. The economy is small — most formal business contact requires prior arrangement.