Challenge Day has developed into the biggest leisure sports event in Hungary.

In the previous years 8 million people have got moving on Challenge Day. This year in Hungary, the event series will take place on 25 May.

Towns and municipalities from at least 50 countries acros the world are expected to take part in the event. In 2016 the Coca‑Cola Wake Your Body (Testébresztő) programme is the main sponsor of the event. Nomination deadline for participation: 28 April.