Nordic Christmas calendar

A Christmas calendar (Danish: julekalender, Swedish: julkalender, Norwegian: julekalender, Finnish: joulukalenteri, Icelandic: jóladagatal, Faroese: jólakalendari) is a form of Nordic episodic radio or television advent calendar focused on Christmas. It was first introduced in 1957, in Sweden, with the radio series, Barnens adventskalender.