Sudan
Independence Day, 1 January (1956)
Suriname
Independence Day, 25 November (1975)
Swaziland
Independence Day, 6 September (1968)
Sweden
Flag Day, 6 June
Switzerland
Founding of the Swiss Confederation, 1 August (1291)
Syria
Independence Day, 17 April (1946)
Taiwan
Republic Day (Anniversary of the Chinese Revolution), 10
October (1911)
Tajikistan
Independence Day (or National Day), 9 September (1991)
Tanzania
Union Day (Tanganyika and Zanzibar), 26 April (1964)
Thailand
Birthday of King PHUMIPHON, 5 December (1927)