| Country | Capital |
| Tokelau | none; each atoll has its own administrative center
time difference: UTC-11 (6 hours behind Washington, DC during Standard Time) |
| Tonga | name: Nuku'alofa
geographic coordinates: 21 08 S, 175 12 W
time difference: UTC+13 (18 hours ahead of Washington, DC during Standard Time) |
| Trinidad and Tobago | name: Port-of-Spain
geographic coordinates: 10 39 N, 61 31 W
time difference: UTC-4 (1 hour ahead of Washington, DC during Standard Time) |
| Tunisia | name: Tunis
geographic coordinates: 36 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 |
| Turkey | name: Ankara
geographic coordinates: 39 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 |
| Turkmenistan | name: Ashgabat (Ashkhabad)
geographic coordinates: 37 57 N, 58 23 E
time difference: UTC+5 (10 hours ahead of Washington, DC during Standard Time) |
| Turks and Caicos Islands | name: Grand Turk (Cockburn Town)
geographic coordinates: 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 |
| Tuvalu | name: Funafuti
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 |
| Uganda | name: Kampala
geographic coordinates: 0 19 N, 32 25 E
time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |
| Ukraine | name: Kyiv (Kiev)
geographic coordinates: 50 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 |
| United Arab Emirates | name: Abu Dhabi
geographic coordinates: 24 28 N, 54 22 E
time difference: UTC+4 (9 hours ahead of Washington, DC during Standard Time) |
| United Kingdom | name: London
geographic coordinates: 51 30 N, 0 10 W
time difference: UTC 0 (5 hours ahead of Washington, DC during Standard Time)
daylight saving time: +1hr, begins last Sunday in March; ends last Sunday in October |
| United States | name: Washington, DC
geographic coordinates: 38 53 N, 77 02 W
time difference: UTC-5 (during Standard Time)
daylight saving time: +1hr, begins second Sunday in March; ends first Sunday in November
note: the US is divided into six time zones |
| United States Pacific Island Wildlife Refuges | void |
| Uruguay | name: Montevideo
geographic coordinates: 34 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 |
| Uzbekistan | name: Tashkent (Toshkent)
geographic coordinates: 41 20 N, 69 18 E
time difference: UTC+5 (10 hours ahead of Washington, DC during Standard Time) |
| Vanuatu | name: Port-Vila (on Efate)
geographic coordinates: 17 44 S, 168 19 E
time difference: UTC+11 (16 hours ahead of Washington, DC during Standard Time) |
| Venezuela | name: Caracas
geographic coordinates: 10 30 N, 66 56 W
time difference: UTC-4.5 (half an hour ahead of Washington, DC during Standard Time) |
| Vietnam | name: Hanoi
geographic coordinates: 21 02 N, 105 51 E
time difference: UTC+7 (12 hours ahead of Washington, DC during Standard Time) |
| Virgin Islands | name: Charlotte Amalie
geographic coordinates: 18 21 N, 64 56 W
time difference: UTC-4 (1 hour ahead of Washington, DC during Standard Time) |
| Wake Island | void |
| Wallis and Futuna | name: Mata-Utu (on Ile Uvea)
geographic coordinates: 13 57 S, 171 56 W
time difference: UTC+12 (17 hours ahead of Washington, DC during Standard Time) |
| West Bank | void |
| Western Sahara | none
time difference: UTC 0 (5 hours ahead of Washington, DC during Standard Time) |
| World | void |
| Yemen | name: Sanaa
geographic coordinates: 15 21 N, 44 12 E
time difference: UTC+3 (8 hours ahead of Washington, DC during Standard Time) |
| Zambia | name: Lusaka
geographic coordinates: 15 25 S, 28 17 E
time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) |
| Zimbabwe | name: Harare
geographic coordinates: 17 50 S, 31 03 E
time difference: UTC+2 (7 hours ahead of Washington, DC during Standard Time) |
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