djurgården's archrival is aik due to several reasons. aik was founded february 15th 1891, while djurgården was founded march 12th, just four weeks later, both in stockholm city centre. because of this, games between the teams are called tvillingderbyt (lit. "derby of the twins") by the media, a name that hasn't caught on amongst supporters since they don't view themselves as twins and want no affiliation with one another.