Conversation so far:
which jewish festival remembers camping in the desert
Sukkot commemorates the years that the Jews spent in the desert on their way to the Promised Land, and celebrates the way in which God protected them under desert conditions.
what is another jewish holiday besides sukkot
Yom Kippur, also known as the Day of Atonement, is the holiest day of the year in Judaism.
why is yom kippur the holiest day of the year in judaism
On Yom Kippur, the holiest day because it's the day of atonement after Rosh Hashanah, Jews ask God for forgiveness for their sins to secure their fate.
do jewish people do anything else on yom kippur besides ask for forgiveness for their sins
Jews traditionally observe Yom Kippur with an approximate 25-hour period of fasting and intensive prayer, often spending most of the day in synagogue services.

Question: when is the holiday observed
Self-contained rewrite: when is yom kippur observed