Hvar fjortonde dag = Every Two Weeks

Hvar fjortonde dag was a TV programme hosted by Ulf Thorén. In one of the programmes, The Hootenanny Singers performed Mårten Gås.

This song entered Svensktoppen 11 February 1968 and they appeared on the programme a few days later.

Click here for a TV guide from Arbeiderbladet - 16 February 1968, p.21.

Thanks to Carl Magnus Palm and Jozsef.