| Guyana Malawi | Central Africa Time | -06:00 |
| Guyana Kazakhstan | East Kazakhstan Time | -09:00 |
| Guyana Ecuador | Ecuador Time | 01:00 |
| Guyana Cambodia | Indochina Time | -11:00 |
| Guyana Mali | Greenwich Mean Time | -04:00 |
| Guyana Guatemala | Central Time | 02:00 |
| Guyana Zambia | Central Africa Time | -06:00 |
| Guyana Angola | West Africa Time | -05:00 |
| Guyana Zimbabwe | Central Africa Time | -06:00 |
| Guyana Rwanda | Central Africa Time | -06:00 |
| Guyana Greece | Eastern European Time | -06:00 |
| Guyana Portugal | Western European Time | -04:00 |
| Guyana Tunisia | Central European Time | -05:00 |
| Guyana Czech Republic | Central European Time | -05:00 |
| Guyana Belgium | Central European Time | -05:00 |
| Guyana Somalia | East Africa Time | -07:00 |
| Guyana Hungary | Central European Time | -05:00 |
| Guyana Bolivia | Bolivia Time | 00:00 |
| Guyana Burundi | Central Africa Time | -06:00 |
| Guyana Sweden | Central European Time | -05:00 |
| Guyana Dominican Republic | Atlantic Time | 00:00 |
| Guyana Belarus | Moscow Time | -07:00 |
| Guyana Haiti | Eastern Time | 01:00 |
| Guyana Benin | West Africa Time | -05:00 |
| Guyana Azerbaijan | Azerbaijan Time | -08:00 |
| Guyana Austria | Central European Time | -05:00 |
| Guyana Honduras | Central Time | 02:00 |
| Guyana Switzerland | Central European Time | -05:00 |
| Guyana Tajikistan | Tajikistan Time | -09:00 |
| Guyana Bulgaria | Eastern European Time | -06:00 |
| Guyana Togo | Greenwich Mean Time | -04:00 |
| Guyana Libya | Eastern European Time | -06:00 |
| Guyana Jordan | Eastern European Time | -06:00 |
| Guyana Paraguay | Paraguay Time | -01:00 |
| Guyana Laos | Indochina Time | -11:00 |
| Guyana Papua New Guinea | Papua New Guinea Time | -14:00 |
| Guyana El Salvador | Central Time | 02:00 |
| Guyana Nicaragua | Central Time | 02:00 |
| Guyana Eritrea | East Africa Time | -07:00 |
| Guyana Kyrgyzstan | Kyrgyzstan Time | -10:00 |
| Guyana Denmark | Central European Time | -05:00 |
| Guyana Slovakia | Central European Time | -05:00 |
| Guyana Sierra Leone | Greenwich Mean Time | -04:00 |
| Guyana Finland | Eastern European Time | -06:00 |
| Guyana Norway | Central European Time | -05:00 |
| Guyana Turkmenistan | Turkmenistan Time | -09:00 |
| Guyana Central African Republic | West Africa Time | -05:00 |
| Guyana Singapore | Singapore Standard Time | -12:00 |
| Guyana Georgia | Georgia Time | -08:00 |
| Guyana Ireland | Ireland Time | -04:00 |