Sweatpants Day, World Penguin Day, No Brainer Day: Sounds like fun at first, right? What sometimes sounds like pointless children's fantasies are action days that, at second glance, have a major impact on society. They inspire. They draw attention to real problems. They affect people and the planet. And above all: they are a lot of fun. ISPO.com introduces you to the most important "sports holidays" of the year.
