According to the DR site, some cherry-picked dates in the history of Danmarks Radio [DR]:
1st April 1925: “Statsradiofonien” starts broadcasting trials
1926: Statsradiofonien begins to broadcast news in co-operation with the daily press, who provide the news for “Pressens Radioavis”.
2nd October 1952: TV begins in Demark.
1954: Daily TV broadcasts begin
1959: “Statsradiofonien” changes name to Danmarks Radio.
1964: [...]