Benin runs at UTC+1, permanently. West Africa Time (WAT), IANA identifier Africa/Porto-Novo. No daylight saving, no seasonal adjustment, no complexity. The clock is steady.
Porto-Novo is the constitutional capital, though Cotonou functions as the economic and administrative center. The IANA identifier uses Porto-Novo.
The Dahomey kingdom and colonial time
Before French colonization, the territory that is now Benin was home to several significant kingdoms, most notably the Kingdom of Dahomey, which dominated the region from the 17th through 19th centuries. Dahomey was a highly organized military state that conducted warfare to capture slaves for sale to European traders, particularly the Portuguese and later the French and British.
The slave trade through the Port of Ouidah (in what is now Benin) was massive. An estimated 1.2 million enslaved people passed through Ouidah between 1550 and 1850, making it one of the largest slave-trading ports in Africa. The Route des Esclaves (Slave Route) in Ouidah, now a historical monument, ends at the Door of No Return, a memorial arch at the beach where enslaved people were loaded onto ships.
French colonization formalized in 1894, and the territory was administered as Dahomey until independence in 1960. The republic was renamed Benin in 1975 under the Marxist government of Mathieu Kérékou, taking the name from the Bight of Benin (which is itself named after the Benin Kingdom, a different and still-existing traditional monarchy in what is now Nigeria).
UTC+1 was inherited from French colonial administration and retained unchanged. France observes CET (UTC+1 winter, UTC+2 summer); Benin kept the permanent winter-equivalent without DST.
Voodoo and the calendar
Benin is recognized as the birthplace of Vodoun (Voodoo), a religious tradition that originated among the Fon and Ewe peoples and spread through the Atlantic slave trade to Haiti, Brazil, Cuba, and New Orleans. January 10 is officially National Voodoo Day in Benin, marked by ceremonies in Ouidah.
Vodoun practice is deeply tied to time and cycles: annual festivals, ancestral calendars, ritual timing. The Gelede masquerade festival (a UNESCO Intangible Cultural Heritage) is performed at specific times of the agricultural and spiritual year. These timings are determined by traditional religious authorities, not UTC offsets.
This dual temporality, official UTC+1 for government and commerce, traditional spiritual calendars for religious life, coexists in Benin as it does in many African countries.