Sudan:
Independence Day, 1 January (1956)
Suriname:
Independence Day, 25 November (1975)
Svalbard:
NA
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)
Tajikistan:
Independence Day, 9 September (1991)
Tanzania:
Union Day (Tanganyika and Zanzibar), 26 April (1964)
Thailand:
Birthday of King PHUMIPHON, 5 December (1927)