| Portsmouth Osio Sotto | Central European Time | -01:00 |
| Portsmouth Saxapahaw | Eastern Time | 05:00 |
| Portsmouth Angwin | Pacific Time | 08:00 |
| Portsmouth Ashbourne | United Kingdom Time | 00:00 |
| Portsmouth Zollikerberg | Central European Time | -01:00 |
| Portsmouth Lorne | Eastern Australia Time | -09:00 |
| Portsmouth Drummoyne | Eastern Australia Time | -09:00 |
| Portsmouth Algerias | Colombia Time | 06:00 |
| Portsmouth Pieterburen | Central European Time | -01:00 |
| Portsmouth Saxonburg | Eastern Time | 05:00 |
| Portsmouth Ange-Gardien | Eastern Time | 05:00 |
| Portsmouth Arundel | Eastern Time | 05:00 |
| Portsmouth Wilton Manors | Eastern Time | 05:00 |
| Portsmouth Loro Piceno | Central European Time | -01:00 |
| Portsmouth Dresher | Eastern Time | 05:00 |
| Portsmouth Algermissen | Central European Time | -01:00 |
| Portsmouth Piedralaves | Central European Time | -01:00 |
| Portsmouth Sayalonga | Central European Time | -01:00 |
| Portsmouth Ang Sila | Indochina Time | -06:00 |
| Portsmouth Artà | Central European Time | -01:00 |
| Portsmouth Wiltz | Central European Time | -01:00 |
| Portsmouth Lorquí | Central European Time | -01:00 |
| Portsmouth Draycott | United Kingdom Time | 00:00 |
| Portsmouth Algood | Central Time | 06:00 |
| Portsmouth Picton | New Zealand Time | -11:00 |
| Portsmouth Sint-Jans-Molenbeek | Central European Time | -01:00 |
| Portsmouth Angadipuram | India Standard Time | -04:30 |
| Portsmouth Arruda dos Vinhos | Western European Time | 00:00 |
| Portsmouth Winchcombe | United Kingdom Time | 00:00 |
| Portsmouth Losone | Central European Time | -01:00 |
| Portsmouth Drayton | United Kingdom Time | 00:00 |
| Portsmouth Algiers | South Africa Standard Time | -01:00 |
| Portsmouth Picton | Eastern Australia Time | -09:00 |
| Portsmouth Sint-Lambrechts-Herk | Central European Time | -01:00 |
| Portsmouth Aguas Calientes | Peru Time | 06:00 |
| Portsmouth Al Mudayq | Gulf Standard Time | -03:00 |
| Portsmouth Winchester | Eastern Time | 05:00 |
| Portsmouth Lost Hills | Pacific Time | 08:00 |
| Portsmouth Douglas | Eastern Time | 05:00 |
| Portsmouth Algoma | Central Time | 06:00 |
| Portsmouth Pictou | Atlantic Time | 04:00 |
| Portsmouth Sint-Martens-Latem | Central European Time | -01:00 |
| Portsmouth Aguadilla Pueblo | Atlantic Time | 05:00 |
| Portsmouth Al Jaradiyah | Arabian Time | -02:00 |
| Portsmouth Windcrest | Central Time | 06:00 |
| Portsmouth Lotzwil | Central European Time | -01:00 |
| Portsmouth Doune | United Kingdom Time | 00:00 |
| Portsmouth Finale Ligure | Central European Time | -01:00 |
| Portsmouth Piddlehinton | United Kingdom Time | 00:00 |
| Portsmouth Sint-Niklaas | Central European Time | -01:00 |