| Portsmouth Lisbon | Eastern Time | 05:00 |
| Portsmouth Radoľa | Central European Time | -01:00 |
| Portsmouth Bučovice | Central European Time | -01:00 |
| Portsmouth Staré Město | Central European Time | -01:00 |
| Portsmouth Hong | Central European Time | -01:00 |
| Portsmouth Radda in Chianti | Central European Time | -01:00 |
| Portsmouth Voroneț | Eastern European Time | -02:00 |
| Portsmouth Staveley | United Kingdom Time | 00:00 |
| Portsmouth Lisbane | United Kingdom Time | 00:00 |
| Portsmouth Rạch Giá | Indochina Time | -07:00 |
| Portsmouth Buchanan | Eastern Time | 05:00 |
| Portsmouth Stari Grad | Central European Time | -01:00 |
| Portsmouth Hong Kong | Hong Kong Time | -08:00 |
| Portsmouth Schaerbeek | Central European Time | -01:00 |
| Portsmouth Vosselaar | Central European Time | -01:00 |
| Portsmouth Starke | Eastern Time | 05:00 |
| Portsmouth Lisboa | Western European Time | 00:00 |
| Portsmouth Scarborough | Eastern Time | 05:00 |
| Portsmouth Buchs | Central European Time | -01:00 |
| Portsmouth Sternatia | Central European Time | -01:00 |
| Portsmouth Honiton | United Kingdom Time | 00:00 |
| Portsmouth Scarness | Eastern Australia Time | -10:00 |
| Portsmouth Voorhees Township | Eastern Time | 05:00 |
| Portsmouth Stephenville | Newfoundland Time | 03:30 |
| Portsmouth Lisboa | Western European Time | 00:00 |
| Portsmouth Scarperia e San Piero | Central European Time | -01:00 |
| Portsmouth Carpinteria | Pacific Time | 08:00 |
| Portsmouth Stellarton | Atlantic Time | 04:00 |
| Portsmouth Horseheads | Eastern Time | 05:00 |
| Portsmouth Sayane Kh | India Standard Time | -05:30 |
| Portsmouth Volcano | Hawaii-Aleutian Time | 10:00 |
| Portsmouth Steinbach | Central European Time | -01:00 |
| Portsmouth Lititz | Eastern Time | 05:00 |
| Portsmouth Scaling Dam | United Kingdom Time | 00:00 |
| Portsmouth Carovigno | Central European Time | -01:00 |
| Portsmouth Steinfeld | Central European Time | -01:00 |
| Portsmouth Ixelles | Central European Time | -01:00 |
| Portsmouth Sidon District | Eastern European Time | -02:00 |
| Portsmouth Volterra | Central European Time | -01:00 |
| Portsmouth Steelville | Central Time | 06:00 |
| Portsmouth Lismore | Eastern Australia Time | -11:00 |
| Portsmouth Sidmouth | United Kingdom Time | 00:00 |
| Portsmouth Buena | Eastern Time | 05:00 |
| Portsmouth Stayner | Eastern Time | 05:00 |
| Portsmouth Horní Věstonice | Central European Time | -01:00 |
| Portsmouth Siesta Key | Eastern Time | 05:00 |
| Portsmouth Vitthalapur | India Standard Time | -05:30 |
| Portsmouth Tartus | Eastern European Time | -02:00 |
| Portsmouth Lake Bluff | Central Time | 06:00 |
| Portsmouth Signal Mountain | Eastern Time | 05:00 |