Mention the important days in the Israelites calendar?

1. Passover (Pesach) - commemorates the Israelites' liberation from slavery in Egypt
2. Yom Kippur - the Day of Atonement, a day of fasting and repentance
3. Rosh Hashanah - the Jewish New Year
4. Hanukkah - the Festival of Lights, commemorating the rededication of the Second Temple in Jerusalem
5. Purim - commemorates the deliverance of the Jewish people from a plot to destroy them in ancient Persia
6. Shavuot - commemorates the giving of the Torah at Mount Sinai
7. Sukkot - the Feast of Tabernacles, a harvest festival commemorating the Israelites' time in the wilderness

Passover - Commemorates the Israelites' liberation from slavery in Egypt.
Feast of Weeks (Pentecost) - Celebrates the giving of the Torah to Moses on Mount Sinai.
Feast of Trumpets - Marks the beginning of the new year.
Day of Atonement (Yom Kippur) - A day of fasting and repentance.
Feast of Tabernacles (Sukkot) - Celebrates the Israelites' wandering in the wilderness after leaving Egypt.
Hanukkah - Commemorates the Maccabees' victory over the Seleucid Greeks.
Purim - Celebrates the Israelites' deliverance from Haman's plot to destroy them.