The Jewish New Year
Rosh Hashanah, first of the High Holidays, is the Jewish New Year. It is the anniversary of the creation of Adam and Eve, and a day of judgment and coronation of G‑d as king.
The Day of Atonement
Yom Kippur (the Day of Atonement) is the holiest day on the Jewish calendar, when we fast, pray, seek forgiveness from G-d and our fellows, and come closer to G-d. It is the peak of the High Holidays.
The seven days of Sukkot—celebrated by dwelling in the sukkah, taking the Four Kinds, and rejoicing—is the holiday when we expose ourselves to the elements in covered huts, commemorating G‑d's sheltering our ancestors as they traveled from Egypt to the Promised Land. The Four Kinds express our unity and our belief in G‑d’s omnipresence. Coming after the solemn High Holidays, it is a time of joy and happiness
Following the seven joyous days of Sukkot, comes the happy holiday known as Shemini Atzeret/Simchat Torah.