Original: A rival flag of vertical black and red panels was used at various times , most recently in the period from May 25 1964 to February 25 1986 , during the family dictatorship of François and Jean-Claude Duvalier .
Simplified: From May 25 1964 to February 25 1986 , during the dictatorship of Francois and Jean-Claude Duvalier , the country had a different flag , in red and black , and divided vertically , not horizontally .