If you are in Stockholm on the 22nd of september you might want to visit Södermalm and Old Town to enjoy a full day of fun events. There are fleemarkets, a free double decker bus between events and a whole lot of other things going on, just a few more examples, music concerts at Medborgarplatsen, police tweetup, Katarina fire station will show their fire trucks, the hotell Sjöfartshotellet at Slussen will serve free coffee and buns,