What is "weihnachten"

Weihnachten is the observance of what is commonly known in English as Christmas Eve in the German-speaking countries like Germany, Austria and Switzerland. It is also widespread in countries with a German-speaking minority, such as Transylvania in Romania, South Tyrol in Italy, Eupen in Belgium, and various diasporas such as the German Brazilian and German American communities. Traditions of Weihnachten influenced Christmas and Advent culture throughout the world.