| Opfikon Emu Plains | Eastern Australia Time | -08:00 |
| Opfikon Bakewell | United Kingdom Time | 01:00 |
| Opfikon Empuriabrava | Central European Time | 00:00 |
| Opfikon Enderby | Pacific Time | 09:00 |
| Opfikon Englishtown | Eastern Time | 06:00 |
| Opfikon England | Eastern European Time | -01:00 |
| Opfikon Engelberg | Central European Time | 00:00 |
| Opfikon Distrito Federal | Central Time | 07:00 |
| Opfikon Dinant | Central European Time | 00:00 |
| Opfikon Dingle | Ireland Time | 01:00 |
| Opfikon Dikson | Krasnoyarsk Time | -05:00 |
| Opfikon Dikili | Turkey Time | -01:00 |
| Opfikon Differdange | Central European Time | 00:00 |
| Opfikon Digne | Central European Time | 00:00 |
| Opfikon Dillingen | Central European Time | 00:00 |
| Opfikon Dillon | Mountain Time | 08:00 |
| Opfikon Dinan | Central European Time | 00:00 |
| Opfikon Embrun | Eastern Time | 06:00 |
| Opfikon Emerald Beach | Eastern Australia Time | -08:00 |
| Opfikon Emeryville | Pacific Time | 09:00 |
| Opfikon Emmaus | Eastern Time | 06:00 |
| Opfikon Eltham | New Zealand Time | -10:00 |
| Opfikon Elysburg | Eastern Time | 06:00 |
| Opfikon Emalahleni | South Africa Standard Time | 00:00 |
| Opfikon Elwood | Eastern Australia Time | -08:00 |
| Opfikon Elx | Central European Time | 00:00 |
| Opfikon Els Hostalets de Pierola | Central European Time | 00:00 |
| Opfikon Elsa | Central Time | 07:00 |
| Opfikon Elmvale | Eastern Time | 06:00 |
| Opfikon Elsternwick | Eastern Australia Time | -08:00 |
| Opfikon Elstree | United Kingdom Time | 01:00 |
| Opfikon Elon | Eastern Time | 06:00 |
| Opfikon Elora | Eastern Time | 06:00 |
| Opfikon Elmsdale | Atlantic Time | 05:00 |
| Opfikon Djelida | Central European Time | 01:00 |
| Opfikon Djilali Ben Amar | Central European Time | 01:00 |
| Opfikon Djerba Midun | Central European Time | 01:00 |
| Opfikon Djendel | Central European Time | 01:00 |