"I am not swimming until Tuesday."
Translation:Jag simmar inte förrän på tisdag.
I feel you, skigelibeli. As a beginner, it really throws me too. The structure is really hard to get my head around. I did not see a need for på, until it was restructured the way GS4Lef explained. But it is hard to know that we have to actually do that! Have a lingot for shared pain.