| Guyana China | China Time | -12:00 |
| Guyana India | India Standard Time | -09:30 |
| Guyana United States | United Kingdom Time | -04:00 |
| Guyana Brazil | Brasilia Time | -01:00 |
| Guyana Pakistan | Pakistan Time | -09:00 |
| Guyana Russia | Moscow Time | -07:00 |
| Guyana Mexico | Central Time | 02:00 |
| Guyana Philippines | Philippine Time | -12:00 |
| Guyana Vietnam | Indochina Time | -11:00 |
| Guyana Ethiopia | East Africa Time | -07:00 |
| Guyana Germany | Central European Time | -05:00 |
| Guyana Egypt | Eastern European Time | -06:00 |
| Guyana Turkey | Turkey Time | -07:00 |
| Guyana Thailand | Indochina Time | -11:00 |
| Guyana France | Central European Time | -05:00 |
| Guyana United Kingdom | United Kingdom Time | -04:00 |
| Guyana Italy | Central European Time | -05:00 |
| Guyana South Africa | South Africa Standard Time | -06:00 |
| Guyana South Korea | Korean Time | -13:00 |
| Guyana Spain | Central European Time | -05:00 |
| Guyana Tanzania | East Africa Time | -07:00 |
| Guyana Argentina | Argentina Time | -01:00 |
| Guyana Kenya | East Africa Time | -07:00 |
| Guyana Poland | Central European Time | -05:00 |
| Guyana Sudan | Central Africa Time | -06:00 |
| Guyana Algeria | Central European Time | -05:00 |
| Guyana Morocco | Western European Time | -05:00 |
| Guyana Canada | Eastern Time | 01:00 |
| Guyana Uganda | East Africa Time | -07:00 |
| Guyana Peru | Peru Time | 01:00 |
| Guyana Iraq | Arabian Time | -07:00 |
| Guyana Afghanistan | Afghanistan Time | -08:30 |
| Guyana Nepal | Nepal Time | -09:45 |
| Guyana Malaysia | Malaysia Time | -12:00 |
| Guyana Uzbekistan | Uzbekistan Time | -09:00 |
| Guyana Venezuela | Venezuela Time | 00:00 |
| Guyana Ghana | Greenwich Mean Time | -04:00 |
| Guyana Yemen | Arabian Time | -07:00 |
| Guyana North Korea | Pyongyang Time | -13:00 |
| Guyana Syria | Eastern European Time | -06:00 |
| Guyana Mozambique | Central Africa Time | -06:00 |
| Guyana Romania | Eastern European Time | -06:00 |
| Guyana Australia | Eastern Australia Time | -15:00 |
| Guyana Sri Lanka | India Standard Time | -09:30 |
| Guyana Côte d'Ivoire | Greenwich Mean Time | -04:00 |
| Guyana Cameroon | West Africa Time | -05:00 |
| Guyana Chile | Philippine Time | -12:00 |
| Guyana Netherlands | Central European Time | -05:00 |
| Guyana Burkina Faso | Greenwich Mean Time | -04:00 |
| Guyana Niger | West Africa Time | -05:00 |