You should have bought a "Rugby" clock in England. Many of these clocks come in four different versions: Japan, Europe, UK and USA, depending on which signal

You should have bought a "Rugby" clock in England. Many of these clocks come in four different versions: Japan, Europe, UK and USA, depending on which signal they use (JFY, DCF77, Rugby, WWVB) DCF77 works OK in Denmark, provided you don't have too much local noise (switch-modes, old televisions etc. etc.)