Zu welchem Fest tragen Menschen in Deutschland bunte Kostüme und Masken?At which festival do people in Germany wear colorful costumes and masks?

Explanation

Rosenmontag is the highlight of the Karneval/Fasching season, marked by parades where participants wear colorful costumes and masks. The Maifeiertag, Oktoberfest and Pentecost are celebrated differently and do not traditionally involve such masquerade.