Sukkot has three names that denote the different meanings of the holiday:
Sukkot – Sukkot commemorates the Sukkot, the booths, where the Israelites lived during their time in the desert after exiting Egypt.
Harvest Festival – Chag Assif – חג אסיף – Sukkot is an agricultural holiday. It is the time to celebrate the end of the agricultural year, the time of gathering the last fruits of the summer. Exodus 23:16 states: “And the feast of harvest, the firstfruits of thy labours, which thou hast sown in the field: and the feast of ingathering, which is in the end of the year, when thou hast gathered in thy labours out of the field.”
Time of Our Joy – Zman Simchatenu– זמן שמחתנו – The Torah tells us three times that we need to rejoice on Sukkot, hence the name Time of Our Joy.