The sun and the clock in Cotonou (2026)
Cotonou lies at 2.4°E. Its time zone, UTC+1, is built around the 15°E meridian. The 12.6° gap between them means the clock runs roughly 50 minutes ahead of the sun: solar noon arrives at about 12:50 rather than 12:00. The zone holds UTC+1 all year — there is no daylight saving here.
The longest day of 2026 is 22 June, with 12h 30m of daylight. The shortest is 22 December, with 11h 45m. The swing between them is 44 minutes. Within a few degrees of the equator the length of the day barely moves all year.
The earliest sunrise and the latest sunset do not land on the longest day. In Cotonou the sun comes up earliest on 25 May at 06:34, while the latest sunset waits until 18 July at 19:10. The equation of time is what separates them: the Earth's elliptical orbit and axial tilt move solar noon back and forth by several minutes over the year.
The sky stays usably light for a while after the sun goes down. In Cotonou that civil twilight runs about 21 minutes at the equinox.
Every figure in this section is computed from the city's own latitude, longitude and IANA time zone using NOAA solar algorithms (Spencer, 1971), accurate to about ±2 arcminutes below 65° latitude.