Summarize this article in one sentence.
Chanukah begins on the same day of the Jewish calendar each year, the 24th day of the month of Kislev. Because the Jewish and Roman calendars are different, Chanukah begins on a different day each year on the Roman calendar. All Jewish holidays begin at sunset, so you should get your friends or family together with you to light the candles just after the sun sets.  Including friends and family in the candle lighting ritual a very important aspect of Chanukah. A large part of Judaism is sharing the miracle of Chanukah and passing the tradition onto your children. For this reason, try to include others in the candle lighting! The exception is Friday night, when the menorah should be lit before sunset. This is because Friday night is the start of Shabbat, or the day of rest, and lighting the menorah constitutes as work (which should not be done after Shabbat begins). On your chanukiah, you should see 9 slots for candles, with eight slots on one level and one slot elevated above the rest. This is the spot for the shamash, or the candle used to light all the other candles. Place one candle in this elevated spot.  Every night of Chanukah, you place and light the shamash first before the other candles. The word “shamash” means “attendant” in Hebrew, and its elevation away from the other candles is meant to separate it from the candles that represent each day of Chanukah. Its position also alludes to its important role of lighting the other candles.  It doesn’t matter what color candles you use. Some choose traditional blue and white candles, while others prefer differently colored candles!  The candelabra Jewish people use for Chanukah is actually a "chanukiah," which has nine branches, not a menorah, which has seven. People incorrectly call the chanukiah a menorah, but they have become accepted as the same thing. If you wish to be technically accurate, call the candelabra a chanukiah. Every night of Chanukah, you add one more candle. On the first night of Chanukah, place a candle in the right-most slot. After the first night of Chanukah, add one candle for each night, starting from the right-most slot and going left.  For instance, on the second night of Chanukah, place the shamash candle in its slot and the candle representing the first night of Chanukah in the right-most slot. Place the candle representing the second night of Chanukah in the slot next to the previous candle (the second to the right-most slot). On the third night, place the candles as you did on the second night, adding a fourth candle in the slot third to the right.

Summary:
Begin at sunset of the 24th day of the month of Kislev. Gather your family or friends just after sunset. Place the shamash in the chanukiah. Add the other candles.