I originally posted this on the other site back when I took the picture, and it resulted in a lot of confused comments, especially from Americans, eventually getting removed by overzealous mods. Either way, I promise you that this date does not exist, and has never existed.
What? This makes so little sense I don't even know how to proceed. It's an expiration date.
Source: I'm also Swedish like OP and frequently shop at ICA - the biggest supermarket chain we've got, who also have their own line of products which are baked/cooked/prepared and packaged centrally and sent out to ICA stores all over the country. Those bagels are one of those products.