Chanukah

In the time of the second Bet Hamikdash, the Greek kings made decrees against the Jews in order to make them forget Torah and Judaism. They broke into the Bet Hamikdash and defiled it until Hashem had mercy on the Jews and saved them. The salvation came through the Chashmonaim who were victorious over the Greeks and served as Cohanim Gedolim. They returned to the Beit Hamikdash and only found one pure flask of oil which was enough to light for only one day. A miracle occurred and it lasted eight days. On the day that they found the flask, on the 25th of Kislev, the Rabbis established a holiday for eight days of festivity and joy called Chanukah. Below are various articles related to the halachot of Chanukah:

Chanukah Candles	Hallel And Other Minhagim
Lighting Chanukah Candles Placement of the Chanukah Candles Earliest and Latest time to light Chanukah Candles Lighting Chanukah Candles on Friday afternoon Lighting Chanukah Candles in Shul Doing an activity before lighting Chanukah Candles Leftover oil and wicks Having a kosher Chanukia Kosher oil, wicks, and candles for Chanukah Candles A poor person lighting Chanukah Candles	Chizuk for Chanukah Hallel of Chanukah Al Hanissim on Chanukah Mourning and Fasting on Chanukah Minhagim of Chanukah