A Jewish holiday or festival is a day or series of days observed by Jews as a holy or secular commemoration of an important event in Jewish history. In Hebrew, Jewish holidays and festivals, depending on their nature, may be called yom tov ("good day") (Yiddish: yontif) or chag ("festival") or ta'anit ("fast").

The origins of various Jewish holidays generally can be found in Biblical mitzvot (commandments), rabbinical mandate, and modern Israeli history.
Contents

* 1 Rosh Ha-Shanah — The Jewish New Year
* 2 Aseret Yemei Teshuva — Ten Days of Repentance
* 3 Yom Kippur — Day of Atonement
* 4 Sukkot
* 5 Shemini Atzeret and Simchat Torah
* 6 Hanukkah — Festival of Lights
* 7 Tenth of Tevet
* 8 Tu Bishvat-New Year of the Trees
* 9 Purim — Festival of Lots
* 10 New Year for Kings
* 11 Pesach — Passover
* 12 Sefirah — Counting of the Omer
* 13 Lag Ba'omer
* 14 New Israeli/Jewish national holidays
o 14.1 Yom HaShoah — Holocaust Remembrance day
o 14.2 Yom Hazikaron — Memorial Day
o 14.3 Yom Ha'atzma'ut — Israel Independence Day
o 14.4 Yom Yerushalaim - Jerusalem Day
* 15 Shavuot — Feast of Weeks — Yom HaBikurim
* 16 Seventeenth of Tammuz
* 17 The Three Weeks and the Nine Days
* 18 Tisha B'av — Ninth of Av
* 19 Tithe of animals
* 20 Rosh Chodesh — the New Month
* 21 Shabbat — The Sabbath — שבת
* 22 Acharei hachagim
* 23 Variances in observances