Sierra Leone:
Independence Day, 27 April (1961)
Singapore:
Independence Day, 9 August (1965)
Slovakia:
Constitution Day, 1 September (1992)
Slovenia:
Independence Day/Statehood Day, 25 June (1991)
Solomon Islands:
Independence Day, 7 July (1978)
Somalia:
Foundation of the Somali Republic, 1 July (1960)
South Africa:
Freedom Day, 27 April (1994)
South Georgia and the South Sandwich Islands:
Liberation Day, 14
June (1982)
Spain:
Hispanic Day, 12 October
Sri Lanka:
Independence Day, 4 February (1948)