| Cornwall Beckett Ridge | Eastern Time | 00:00 |
| Cornwall Beaver Falls | Eastern Time | 00:00 |
| Cornwall Beauraing | Central European Time | -06:00 |
| Cornwall Beaumont | Mountain Time | 02:00 |
| Cornwall Beaumont-Pied-de-Bœuf | Central European Time | -06:00 |
| Cornwall Bayerisch Eisenstein | Central European Time | -06:00 |
| Cornwall Bayan Lepas | Malaysia Time | -12:00 |
| Cornwall Bayan Lepas | Malaysia Time | -12:00 |
| Cornwall Bayswater | Western Australia Time | -12:00 |
| Cornwall Bogotá | Colombia Time | 01:00 |
| Cornwall Boğazkent Belediyesi | Turkey Time | -07:00 |
| Cornwall Bedford | Western Australia Time | -12:00 |
| Cornwall Bedford | Atlantic Time | -01:00 |
| Cornwall Boksburg | South Africa Standard Time | -06:00 |
| Cornwall Boliqueime | Western European Time | -05:00 |
| Cornwall Cala Ferrera | Central European Time | -06:00 |
| Cornwall Cala Millor | Central European Time | -06:00 |
| Cornwall Calaf | Central European Time | -06:00 |
| Cornwall Boppelsen | Central European Time | -06:00 |
| Cornwall Boquete | Eastern Time | 01:00 |
| Cornwall Booneville | Central Time | 01:00 |
| Cornwall Boonville | Pacific Time | 03:00 |
| Cornwall Boothbay | Eastern Time | 00:00 |
| Cornwall Boothbay Harbor | Eastern Time | 00:00 |
| Cornwall Bondi Beach | Eastern Australia Time | -14:00 |
| Cornwall Bondi Junction | Eastern Australia Time | -14:00 |
| Cornwall Bonlez | Central European Time | -06:00 |
| Cornwall Bonnac | Central European Time | -06:00 |
| Cornwall Bonifay | Central Time | 01:00 |
| Cornwall Calistoga | Pacific Time | 03:00 |
| Cornwall Calvi | Central European Time | -06:00 |
| Cornwall Calbe | Central European Time | -06:00 |
| Cornwall Caldes d'Estrac | Central European Time | -06:00 |
| Cornwall Calolziocorte | Central European Time | -06:00 |
| Cornwall Caloocan | Philippine Time | -12:00 |
| Cornwall Califon | Eastern Time | 00:00 |
| Cornwall California | Eastern Time | 00:00 |
| Cornwall Calimesa | Pacific Time | 03:00 |