1) December observance
Found on
https://www.crosswordclues.com/clue/nittel-nacht
Nittel Nacht is a name given to Christmas Eve by Jewish scholars in the 17th century, although Rabbi Samuel Eidels already observed the day by the late 16th century. In the Middle Ages (in Christendom), Jews were forbidden from appearing in public during the high Christmas holidays, and as such the day marked the beginning of a siege of sorts for ...
Found on
http://en.wikipedia.org/wiki/Nittel_Nacht
No exact match found.
