
Yahrzeit (יאָרצײַט), means "Time (of) Year" in Yiddish, alternative spellings include yortsayt, Yohr Tzeit, yahrtzeit, and yartzeit. The word is also used by non-Yiddish-speaking Ashkenazi Jews, and refers to the annual anniversary of the day of death of a relative. The commemoration is known in Ladino as Nahala. It is widely observed, and based on the Jewish tradition that mourners are required to commemorate the death of a relative.
Mourners required to fulfill this observance are the children, siblings, spouses and parents of the deceased. The custom is first discussed in detail in Sefer HaMinhagim by Rabbi Isaac Tyrnau, published in 1566.
The Yahrzeit falls annually on the Hebrew date of the deceased relative's death according to the Hebrew calendar.
The main halakhic obligation is to recite the mourner's version of the Kaddish prayer three times (evening, morning, and afternoon), and many attend synagogue for the evening, morning, and afternoon services on this day. (During the morning prayer service the mourner's Kaddish is recited at least four times.) As a widely practiced custom, mourners also light a special candle that burns for 24 hours, called a "Yahrzeit candle".
Lighting a yahrzeit candle in memory of a loved one is a minhag ("custom") that is deeply ingrained in Jewish life honoring the memory and souls of the deceased.
Strict Jewish law requires that one should fast on the day of a parent's Yahrzeit, although this is not required, some people do observe the custom of fasting on the day of the Yahrzeit. Among many Orthodox Jews it has become customary to make a siyum by completing a tractate of Talmud or a volume of the Mishnah on the day prior to the Yahrzeit, in the honor of the deceased. A halakha requiring a siyum ("celebratory meal"), upon the completion of such a study, overrides the requirement to fast.
Jewish mourners are required to commemorate the death of a first-relative: mother, father, brother, or sister. The main halakhic obligation is to recite the mourner's version of the Kaddish prayer at least three times, Maariv at the evening services, Shacharit at morning services, and Mincha at the afternoon services.
Many synagogues will have lights on a special memorial plaque on one of the synagogue's walls, with names of synagogue members who have died. Each of these lights will be lit for individuals on their Yahrzeit, and all the lights will be lit for a Yizkor service. Some synagogues will also turn on all the lights for memorial days, such as Yom Ha'Shoah. Most people say it the day after they died.
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