They ask which holiday is represented by the menorah behind them.
Plenty of Jewish kids today grow up with a Christmas tree next to their menorah.
More than menorah lighting and dreidel spinning, Hanukkah is known for its culinary delicacy, latkes.
There is no menorah in the Gryffindor common room or any mention of Chanukah in any Harry Potter book.
Gleaming brass, its seven uplifting arms gracefully curved, stood a—menorah!
See for other particulars the above quoted article in menorah, note.
A nine-branched candelabrum used during the Jewish festival of Hanukkah. The center candle, or “starter,” is used to light the other eight candles, with one additional candle lit on each subsequent evening of the celebration.