It is a mitzvah to celebrate in the sukkah. While the Torah instructs us to live in the sukkah for seven days, many choose to only eat meals in the sukkah. When eating or reciting kiddush in the sukkah, recite this blessing:
Seven-day fall agricultural festival associated with temporary booths or huts.
Rabbi Julie Zupan answers - When do you light yizkor (memorial) candles on Yom Kippur? Do you light candles only for immediate family members?