There are many holidays in Israel, celebrated by the various religious groups in the country - each one using its own calendar.
The main Jewish holidays, some lasting more than a day, are Rosh Ha'Shanah (new year), Yom Kippur (Day of Atonement), Sukkot (Feast of Tabernacles), Hanukkah, Purim, Pesach (Passover), Independence Day, and Shavu'ot (Feast of the Weeks).
The main Christians festivals are the Hoy Week, culminating in Easter, and Christmas. Some denominations use the Gregorian calendar and some the Julian calendar.
Muslims have two main holidays, Id el-Adha (Feast of the Sacrifice) and Id el-Fitr (Breaking the Fast), which marks the end of the Holy Month of Ramadan.
It is important to be aware of the holidays to be celebrated during your stay in Israel, especially since they may affect public transportation and opening hours of sites you want to visit.
To check the dates of any holidays occuring during the next months, see Upcoming Events.