word | | Capital |
| October | Switzerland | ... 57 N, 7 26 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| October | Tunisia | ... 48 N, 10 11 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| October | Turkey | ... 56 N, 32 52 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| October | Turks and Caicos Islands | ... 21 28 N, 71 08 W time difference: UTC-5 (same time as Washington, DC during Standard Time) daylight saving time: +1hr, begins first Sunday in April; ends last Sunday in October |
| October | Ukraine | ... 26 N, 30 31 E time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| October | United Kingdom | ... DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October note: applies to the United Kingdom proper, not to its overseas dependencies or territories |
| October | Uruguay | ... 53 S, 56 11 W time difference: UTC-3 (2 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins second Sunday in October; ends second Sunday in March |
| offices | Nauru | no official capital; government offices in Yaren District time difference: UTC+12 (17 hours ahead of Washington, DC during Standard Time) |
| offices | Tanzania | ... E time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) note: legislative offices have been transferred to Dodoma, which is planned as the new national capital; the National ... |
| offices | Tuvalu | ... geographic coordinates: 8 30 S, 179 12 E time difference: UTC+12 (17 hours ahead of Washington, DC during Standard Time) note: administrative offices are located in Vaiaku Village on Fongafale Islet |
| official | Benin | name: Porto-Novo (official capital) geographic coordinates: 6 29 N, 2 37 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) note: Cotonou (seat of government) |
| official | Cote d'Ivoire | ... 0 (5 hours ahead of Washington, DC during Standard Time) note: although Yamoussoukro has been the official capital since 1983, Abidjan remains the commercial and administrative center; the US, like other countries ... |
| official | Nauru | no official capital; government offices in Yaren District time difference: UTC+12 (17 hours ahead of Washington, DC during Standard Time) |
| Oranjestad | Aruba | name: Oranjestad geographic coordinates: 12 31 N, 70 02 W time difference: UTC-4 (1 hour ahead of Washington, DC during Standard Time) |
| Oslo | Norway | name: Oslo geographic coordinates: 59 55 N, 10 45 E time difference: UTC+1 (6 hours ahead of Washington, DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March ... |
| Ottawa | Canada | name: Ottawa geographic coordinates: 45 25 N, 75 42 W time difference: UTC-5 (same time as Washington, DC during Standard Time) daylight saving time: +1hr, begins second Sunday in March; ends ... |
| Ouagadougou | Burkina Faso | name: Ouagadougou geographic coordinates: 12 22 N, 1 31 W time difference: UTC 0 (5 hours ahead of Washington, DC during Standard Time) |
| overseas | France | ... DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October note: applies to metropolitan France only, not to its overseas departments, collectivities, or territories |
| overseas | United Kingdom | ... DC during Standard Time) daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October note: applies to the United Kingdom proper, not to its overseas dependencies or territories |
| own | Tokelau | none; each atoll has its own administrative center time difference: UTC-11 (6 hours behind Washington, DC during Standard Time) |
| Pago | American Samoa | name: Pago Pago geographic coordinates: 14 16 S, 170 42 W time difference: UTC-11 (6 hours behind Washington, DC during Standard Time) |
| Palikir | Micronesia, Federated States of | name: Palikir geographic coordinates: 6 55 N, 158 09 E time difference: UTC+11 (16 hours ahead of Washington, DC during Standard Time) |
| Panama | Panama | name: Panama geographic coordinates: 8 58 N, 79 32 W time difference: UTC-5 (same time as Washington, DC during Standard Time) |