The Jewish holidays in the year 2020 were as follows:

• Rosh Hashanah: began at sundown on September 18, 2020, and ended nightfall on September 20, 2020.
• Yom Kippur: began at sundown on September 27, 2020, and ended nightfall on September 28, 2020.
• Sukkot: began at sundown on October 2, 2020, and lasted for seven days until October 9, 2020.
• Shemini Atzeret / Simchat Torah: October 10, 2020.
• Hanukkah: December 11-18, 2020.
• Purim: March 9-10, 2020.
• Passover: April 8-15, 2020.
• Shavuot: May 29, 2020.

These holidays typically begin at sundown of the day before and end at nightfall of the last day. The dates follow the Hebrew calendar, so the Gregorian calendar dates vary each year.