Besides dwelling in a sukkah, the other significant mitzvah of Sukkot is the taking up of the arba·ah minim, literally “the four species.”
On the mornings of Sukkot, Shacharit and Musaf follow the standard festival format. The lulav and etrog should be shaken.
The intermediate days of Sukkot, the weekdays, combine some features of festival days and normal weekdays to create wholly unique day.
Although the fifth intermediate day of Sukkot is known as Hoshana Rabbah, it is technically just the last day of ḥol ha-mo·eid.