"Når jeg ser et rødt flag smælde" (; ) is the anthem of the Danish Social Democrats.

It is sung at national meetings and congresses, as well as on election nights – regardless of the result.

History The lyrics were written by Oskar Hansen and the music composed by Johannes Madsen in 1923. It was first published in the magazine Ungdomsappellen in 1923 and presented at a Social Democratic Youth of Denmark event in August 1923. It became immensely popular within Social Democratic circles.

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