Why not 10 January?
Time and Date lists Friday 8 January 2027, and lists 10 January for the years before the change. A Benin account of the 2024 law says the holiday is the second Friday of January, with the Thursday before also paid. In 2027 that Thursday is 7 January. The ceremonies people mean are in the Republic of Benin, including Ouidah.
Igue is the palace festival in Benin City, Nigeria, and it was in December. The page is not a costume brief and not a tour.