Yom Kippur, the Day of Atonement, is the holiest day in Judaism. It is a day of fasting and prayer that is celebrated on the 10th of the Hebrew month of Tishrei.
Yom Kippur marks the end of the Ten Days of Repentance. According to Jewish belief, on Yom Kippur judgment is passed on each person for the coming year.
Unlike most of the major Jewish holidays, Hanukkah’s origin is not in the Bible, but rather in events that happened later. This is a holiday that lasts eight days and begins on the 25th of the Hebrew month of Kislev (usually in December).
And thou shalt observe the feast of weeks, even of the first-fruits of wheat harvest, and the feast of ingathering at the turn of the year. (Exodus 34:22)
Rosh Hashanah, commonly referred to as the Jewish New Year, is observed on the first and second days of the Hebrew month of Tishrei, which coincides with late September and early October.
Sukkot, or Feast of Booths, is celebrated from the 15th through the 21st of the Hebrew month of Tishrei (usually October), and is one of the three pilgrimage holidays, on which Jews made pilgrimages to the Temple in Jerusalem.