German Advent Calendars for 2023: We handpicked the coolest Advent calendars from Germany, from beauty, kids and pets to chocolate and coffee. You are supposed to open one window every day starting on 1st December. Every year beautiful and creative Advent Calendars decorate not only children’s rooms in Germany. Young and old enjoy this German tradition. Usually, you will receive a small treat from each window. This is one of the most common German .