| Porthcawl Enmore | Eastern Australia Time | -09:00 |
| Porthcawl Emu Plains | Eastern Australia Time | -09:00 |
| Porthcawl Empuriabrava | Central European Time | -01:00 |
| Porthcawl Emmaus | Eastern Time | 05:00 |
| Porthcawl Enderby | Pacific Time | 08:00 |
| Porthcawl England | Eastern European Time | -02:00 |
| Porthcawl Engelberg | Central European Time | -01:00 |
| Porthcawl Djelida | Central European Time | 00:00 |
| Porthcawl Djerba Midun | Central European Time | 00:00 |
| Porthcawl Djendel | Central European Time | 00:00 |
| Porthcawl Elmsdale | Atlantic Time | 04:00 |
| Porthcawl Djilali Ben Amar | Central European Time | 00:00 |
| Porthcawl Embrun | Eastern Time | 05:00 |
| Porthcawl Elysburg | Eastern Time | 05:00 |
| Porthcawl Emalahleni | South Africa Standard Time | -01:00 |
| Porthcawl Elwood | Eastern Australia Time | -09:00 |
| Porthcawl Elx | Central European Time | -01:00 |
| Porthcawl Emerald Beach | Eastern Australia Time | -09:00 |
| Porthcawl Emeryville | Pacific Time | 08:00 |
| Porthcawl Eltham | New Zealand Time | -12:00 |
| Porthcawl Elsternwick | Eastern Australia Time | -09:00 |
| Porthcawl Elstree | United Kingdom Time | 00:00 |
| Porthcawl Els Hostalets de Pierola | Central European Time | -01:00 |
| Porthcawl Elsa | Central Time | 06:00 |
| Porthcawl Elmvale | Eastern Time | 05:00 |
| Porthcawl Elon | Eastern Time | 05:00 |
| Porthcawl Elora | Eastern Time | 05:00 |
| Porthcawl Dikson | Krasnoyarsk Time | -06:00 |
| Porthcawl Dikili | Turkey Time | -02:00 |
| Porthcawl Dillon | Mountain Time | 07:00 |
| Porthcawl Dillingen | Central European Time | -01:00 |
| Porthcawl Differdange | Central European Time | -01:00 |
| Porthcawl Cramlington | United Kingdom Time | 00:00 |
| Porthcawl Digne | Central European Time | -01:00 |
| Porthcawl Distrito Federal | Central Time | 06:00 |
| Porthcawl Dingle | Ireland Time | 00:00 |
| Porthcawl Dinant | Central European Time | -01:00 |
| Porthcawl Dinan | Central European Time | -01:00 |