Chanukah is celebrated all over the world. The twenty-fifth day of Kislev is the first night of Chanukah.
People celebrate because of the miracle.
There was only enough good oil to last a single day so the Maccabees were worried. A miracle happened when the oil lasted for eight days and eight nights. They play dreidel on Chanukah. Jewish people celebrate Chanukah. In Chanukah they have a menorah.