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São Tomé Island, Saint Thomas and Prince

São Tomé Island uses Greenwich Mean Time, UTC+0, throughout the year. It does not observe seasonal clock changes, so its local time remains aligned with UTC while sunrise and sunset shift gradually with the seasons.

Sao Tome, Saint Thomas and Prince

Sunday, 1 November 2026

UTC+0 · Africa/Sao_Tome

Time and sun data for Sao Tome — the largest city of São Tomé Island

The sun in Sao Tome

Sunrise 5:15 AM Solar noon 11:18 AM Sunset 5:21 PM Daylight 12 h 06 min Night 11 h 54 min Civil twilight 4:53 AM – 5:42 PM

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Current time in São Tomé Island, Saint Thomas and Prince

The current local time on São Tomé Island is the same as UTC. Because the island does not change its clocks for daylight saving time, the offset is dependable in every month. This makes international conversion straightforward. London matches the island while the United Kingdom is on Greenwich Mean Time, but moves one hour ahead when British Summer Time is in effect. Lisbon follows a similar seasonal pattern. Locations elsewhere should be compared by UTC offset.

On São Tomé Island, the clock avoids seasonal travel even when everyone else moves an hour away.

Time zone and clock changes

São Tomé Island belongs to the African island nation officially called São Tomé and Príncipe. Its civil time zone can be summarized as follows: Standard offset: UTC+0 Common time-zone name: Greenwich Mean Time

Daylight saving time: not observed Seasonal clock changes: none A meeting scheduled for the same local hour therefore stays at the same UTC hour all year. The corresponding time abroad may still change if the other location advances or delays its clocks.

Travelers should also distinguish the country from the island. São Tomé Island is the larger of the nation’s two principal islands and contains the national capital. Although the islands share the same civil time, weather and daylight information should be checked for the specific place concerned.

Population centres and sunrise

São Tomé city is the island’s principal urban centre and the capital of the country. Other important settlements include Trindade, Santana, Guadalupe and Neves. They all use the same time zone, so travelling between them requires no clock adjustment.

Sunrise cannot be represented by one permanent clock time. It varies with the date and with the observer’s position on the island. São Tomé lies close to the equator, so day length changes less dramatically than it does at high latitudes, but daily sunrise and sunset times are still not identical throughout the year.

Choose the exact settlement or coordinates. Use the intended local date. Confirm that the result is displayed in UTC+0. Allow for hills, clouds and the local horizon when planning an observation. An astronomical sunrise time describes when the Sun reaches the calculated horizon. A mountain, building or dense cloud can delay the moment when direct sunlight becomes visible. For flights, photography or marine activity, consult a daily forecast or astronomical table rather than relying on a general annual description.

Questions and answers

Does São Tomé Island observe daylight saving time?
No. Local civil time remains on UTC+0 throughout the year.
Is São Tomé city in the same time zone as the rest of the island?
Yes. São Tomé city and the island’s other settlements share the same national time.
Why does sunrise change if the clocks do not?
Clock policy and the Sun’s apparent movement are separate. The time-zone offset stays fixed, while sunrise varies with the date, coordinates and visible horizon.
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