holidays
Opening of carnival ("Karneval"/"Fasching"), on 11-11, at 11:11. (Germany, the Netherlands, and other countries)
Related Wikipedia articles
Carnival
Christian festival before Lent
Carnival is a festive season that occurs at the close of the Christian pre-Lenten period, consisting of Quinquagesima or Shrove Sunday, Shrove Monday, and Shrove Tuesday or Mardi Gras.Source: Wikipedia (CC BY-SA)