First day of the spring break (or påskeferie (easter break). It's sunny and lots and lots of stuff will be happening this week.
Easter lunch is one of them. A Danish easter lunch is the same as the Christmas lunch, just held sometime this week instead of in December. Lots of sild (herring), snaps, beer and good company. Other dishes might also be there: leverpostej, bacon, frikadeller etc. Ìf it's more like a dinner, something with lamb and potatoes is the most common. The table will be decorated with birch branches and items in easter colors.
This is about as traditional as it gets.
If you don't want to make it yourself, you can get an easter dinner menu at one of Cofoco's restaurants for 200 kroner (3, 4 or 5 dishes!!!!). Right here: http://cofoco.dk/paaskemiddage/