Passover (Pesach in Hebrew) is celebrated to commemorate the liberation of the Children of Israel who were led out of slavery in Egypt by Moses.
Rosh Hashanah is the Jewish New Year festival and commemorates the creation of the world.
Yom Kippur, the most sacred and solemn day of the Jewish year, brings the Days of Repentance to a close.
Sukkot commemorates the years that the Jews spent in the desert on their way to the Promised Land.
Hanukkah or Chanukah is the Jewish Festival of Lights.
Tisha B'av is a solemn occasion because it commemorates a series of tragedies that have befallen the Jewish people over the years.
Tu B'Shevat is the Jewish 'New Year for Trees'.
Yom Hashoah is a day set aside for Jews to remember the Holocaust.