Last week it felt like the first week of spring. Everybody thinks 16 degrees is fair enough and acts like summer is there. I was cycling through Westerpark and got an instant summer feeling. I saw selfies filled with grass, a shiny funfair, people wearing sunglasses and a lot of sunblock (oh please, don’t exaggerate). So I did a little research, drew the map of Westerpark and created a data visualization by counting all the things I saw. All these things combined are… the first day of spring!