Hannukkah, the Festival of Lights (and the Feast of Dedication), commemorates the victory of Judah the Maccabee and religious freedom, and the rededication of the Temple in 165 BCE. It also celebrates the power of God and the faithfulness of Israel. Suspension of work is not required. Jews commemorate this event by saying blessings, singing special songs and lighting one candle of the eight branched menorah on each night of the festival until all eight candles are lit.
Simhat Torah (Judaism)
Simhat Torah, or Rejoicing of the Law, is the beginning of the synagogue's annual Torah reading cycle. Reform Jews celebrate it along with Shmini Atzeret.
Shmini Atzeret (Judaism)
Shmini Atzeret is the eighth day of assembly and is a separate holiday concluding Sukkoth and the entire fall holiday season. It marks the beginning of winter in the land of Israel.
Sukkot, a pilgrimage feast and a time of thanksgiving, celebrates God's presence in creation and among the Jewis people.