Independence Day in Senegal is observed every April 4 and commemorates the formation of the Mali Federation in 1959, when Senegal and French Sudan merged. The holiday marks a significant moment in Senegal's history, as the federation ultimately led to Senegal's independence from France on June 20, 1960, following extensive negotiations. Although the Mali Federation existed for only two months due to internal tensions, April 4 remains the date celebrated as Independence Day. The origins of European involvement in Senegal date back to the 15th century, with France gaining control in 1677 and abolishing slavery in the 1850s. This day is marked by various celebrations across the country, reflecting on Senegal's journey towards independence and its cultural heritage.