| Guinea-Bissau Bosnia and Herzegovina | Central European Time | -01:00 |
| Guinea-Bissau Costa Rica | Central Time | 06:00 |
| Guinea-Bissau Croatia | Central European Time | -01:00 |
| Guinea-Bissau New Zealand | New Zealand Time | -13:00 |
| Guinea-Bissau Lebanon | Eastern European Time | -02:00 |
| Guinea-Bissau Puerto Rico | Argentina Time | 03:00 |
| Guinea-Bissau Liberia | Greenwich Mean Time | 00:00 |
| Guinea-Bissau Uruguay | Uruguay Time | 03:00 |
| Guinea-Bissau Panama | Central Time | 06:00 |
| Guinea-Bissau Mauritania | Greenwich Mean Time | 00:00 |
| Guinea-Bissau Congo | West Africa Time | -01:00 |
| Guinea-Bissau Albania | Central European Time | -01:00 |
| Guinea-Bissau Armenia | Armenia Time | -04:00 |
| Guinea-Bissau Lithuania | Eastern European Time | -02:00 |
| Guinea-Bissau Jamaica | Eastern Time | 05:00 |
| Guinea-Bissau Kuwait | Arabian Time | -03:00 |
| Guinea-Bissau Latvia | Eastern European Time | -02:00 |
| Guinea-Bissau Namibia | Central Africa Time | -02:00 |
| Guinea-Bissau Botswana | Central Africa Time | -02:00 |
| Guinea-Bissau Slovenia | Central European Time | -01:00 |
| Guinea-Bissau Lesotho | South Africa Standard Time | -02:00 |
| Guinea-Bissau The Gambia | Eastern Australia Time | -11:00 |
| Guinea-Bissau Guinea-Bissau | Greenwich Mean Time | 00:00 |
| Guinea-Bissau Gabon | West Africa Time | -01:00 |
| Guinea-Bissau Swaziland | South Africa Standard Time | -02:00 |
| Guinea-Bissau Mauritius | Mauritius Time | -04:00 |
| Guinea-Bissau Estonia | Eastern European Time | -02:00 |
| Guinea-Bissau Timor-Leste | East Timor Time | -09:00 |
| Guinea-Bissau Equatorial Guinea | West Africa Time | -01:00 |
| Guinea-Bissau Fiji | Fiji Time | -13:00 |
| Guinea-Bissau Qatar | Arabian Time | -03:00 |
| Guinea-Bissau Reunion | Reunion Time | -04:00 |
| Guinea-Bissau Comoros | East Africa Time | -03:00 |
| Guinea-Bissau Guyana | Guyana Time | 04:00 |
| Guinea-Bissau Djibouti | East Africa Time | -03:00 |
| Guinea-Bissau Bahrain | Arabian Time | -03:00 |
| Guinea-Bissau Bhutan | Bhutan Time | -06:00 |
| Guinea-Bissau Solomon Islands | Solomon Islands Time | -11:00 |
| Guinea-Bissau Cape Verde | Cape Verde Time | 01:00 |
| Guinea-Bissau Luxembourg | Central European Time | -01:00 |
| Guinea-Bissau Suriname | Suriname Time | 03:00 |
| Guinea-Bissau Guadeloupe | Atlantic Time | 04:00 |
| Guinea-Bissau Martinique | Atlantic Time | 04:00 |
| Guinea-Bissau Brunei | Brunei Darussalam Time | -08:00 |
| Guinea-Bissau Belize | Central Time | 06:00 |
| Guinea-Bissau The Bahamas | Eastern Time | 05:00 |
| Guinea-Bissau Barbados | Atlantic Time | 04:00 |
| Guinea-Bissau French Polynesia | Tahiti Time | 10:00 |
| Guinea-Bissau French Guiana | French Guiana Time | 03:00 |
| Guinea-Bissau Samoa | Apia Time | -13:00 |