"En dag" ("One day") is a ballad, which was the Swedish Melodifestivalen 1989 winning song and entry to the Eurovision Song Contest 1989, where it finished 4th. The song was written by Tim Norell, Ola Håkansson and Alexander Bard and performed by Tommy Nilsson. At the Eurovision performance, Nilsson was backed up by , Vicki Benckert, Ankie Bagger, Jerry Williams and . The single peaked at number three on the Swedish Singles Chart. The song also charted on Svensktoppen, peaking at number one on the chart.