20th century YearDateEvent1915Universal suffrage.1916  The political parties Social Democratic Party and Progressive Party are founded .19181 DecemberIceland becomes a sovereign, independent nation.
<meaning-changed> 20th century YearDateEvent1915Universal suffrage.1916  The political parties Social Democratic Party and Progressive Party are founded .19181 DecemberIceland becomes a sovereign, independent nation.
(100) century The political parties Social Democratic Party and Progressive Party are founded .19181 DecemberIceland becomes a sovereign, independent nation.