This is the 160th most frequent Swedish word.
lördagen
"Saturday"
Here, 'lördagen' indicates a specific upcoming Saturday.
På lördagen ska vi gå till marknaden.
On Saturday, we are going to the market.
In this case, 'lördagen' refers to a specific Saturday that is indicated by context.
Vi reste tillbaka hem på lördagen efter vår resa.
We traveled back home on the Saturday after our trip.
'Lördagen' here is used to describe the concept of Saturday as a part of the week.