holidays
Christmas Eve (Christianity) and its related observances: Nittel Nacht (certain Orthodox Jewish denominations)
Related Wikipedia articles
Nittel Nacht
Yiddish name for Christmas Eve
Nittel Nacht or Nittel is a name given to Christmas Eve by Jewish scholars in the 17th century, observed as early as the late 16th century by Rabbi Samuel Eidels.Source: Wikipedia (CC BY-SA)