What is "sommartider"

"Sommartider", written by Per Gessle, is the song that throughout the years has become considered the signature song for Swedish pop group Gyllene Tider. It was released as a single on 18 June 1982. It was re-released both on 27 June 1989 and in 1995. The original version peaked at #6 on the Swedish singles chart and #3 at the Norwegian singles chart, and the 1989 version peaked at #3 on the Swedish singles chart. "Sommartider" was also recorded with lyrics in the English language, with the name "Summer City".