São Tomé and Príncipe · GMT
Tue, 15 Sept 2026
Timezone Guide
São Tomé, São Tomé and Príncipe runs on UTC+0. This time zone stays fixed year-round at UTC+0 — daylight saving time is not observed. There is a 4-hour difference between São Tomé and New York. Standard 9-to-6 working hours overlap for about 5 hours a day with New York. A good time to connect: 13:00–18:00 in São Tomé lines up with 09:00–14:00 in New York. There is a 1-hour difference between São Tomé and London. Standard 9-to-6 working hours overlap for about 8 hours a day with London. A good time to connect: 09:00–17:00 in São Tomé lines up with 10:00–18:00 in London. There is a 9-hour difference between São Tomé and Tokyo. Standard working hours don't overlap at all with Tokyo, so meetings need an early or late slot on one side. This timezone is also shared with cities such as Reykjavík, Accra, Dakar. Keeping these offsets in mind makes it easier to schedule calls or travel to and from São Tomé.
Practical Info
São Tomé (São Tomé and Príncipe) is home to roughly 72K people. Today brings about 12.1 hours of daylight: sunrise at 05:42, sunset at 17:48. This time zone stays fixed year-round at UTC+0 — daylight saving time is not observed. It sits in the Northern Hemisphere, about 0° north of the equator. Traffic drives on the right.
Flag
São Tomé and Príncipe
Capital
São Tomé 👑
Continent
Africa
Time Zone
GMT · Africa/Sao_Tome
Coordinates
0.33°N, 6.73°E
Currency
STN (Db)
Calling Code
+239
Driving Side
Right
Hemisphere
Northern
Language
Portuguese
Measurement System
Metric
Did You Know?
São Tomé and Príncipe was for a period in the early 20th century the world's largest cocoa producer, on islands totalling about 960 square kilometres. The plantation houses, the roças, still stand in the forest.
The clock: São Tomé keeps UTC+0 and sits essentially on the equator and near the prime meridian — about as close to the 0,0 point of the coordinate system as any inhabited place.
Annual Daylight
Working Hours
6h overlap