What are the days on which Jews fast, and why?


Fasting means abstaining from food as a sign of mourning or in amendment of sins. A major fast involves refraining from food, water, sexual intercourse, and leather-soled footwear. The physical abstention is regarded not as an end in and of itself but rather as a means to spiritual affliction and self-abasement. The regulation of Yom Kippur specifically mentions that it shall be observed "from evening to evening;" for twenty-five hours. The only other fast to which this applies is Tishah B'av, observed in commemoration of the destruction of the Temple. The period of fasting on all other fasts lasts, as aforementioned, from sunrise to nightfall.

Fasting is obligatory for males over thirteen and girls over twelve (the ages at which they become bar and bat mitzvah). Exceptions are made, naturally, for the sick or when health might be endangered. There are fasts besides Yom Kippur -- Tishah B'av and the five minor fasts. Public and private fasts were also instituted. These were to ward off calamities (most often a severe drought), hoping that through days of supplication and a call to penitence, whatever disaster was happening at the moment would cease. They are:

The Fast of Gedaliah. Commemorate the killing of the Jewish governor of Judah, a critical event in the downfall of the first commonwealth.

The Fast of Tevet. Mark the beginning of the siege of Jerusalem on this day, which has also been proclaimed a memorial day for the six million Jews who died in the Holocaust.

The Fast of Esther. Remember the three days that Esther fasted before approaching King Ahashverosh on behalf of the Jewish people. See Purim, above.

The Fast of the Firstborn. Observed on the day preceding Passover, only do so if you're a firstborn male; honor the fact that you were saved from the plague of the firstborn in Egypt.

The Fast of Tammuz. Mourn the date when the walls of Jerusalem were breached.