The use of a
yahrzeit candle is a widely practiced
custom, where mourners light a yahrzeit candle that burns for 24 hours, on the anniversary of the death on the
Hebrew calendar.) It is also customary to light the candle during the
shiva, usually a larger one that lasts the entire seven days. In the absence of a seven-day
Shiva candle, seven yahrzeit candles can be lit on successive days (but not in violation of Shabbat). Today, some people use an electric yahrzeit candle that plugs into the wall instead of a candle for safety reasons, such as in a hospital. A candle similarly appears in the
midrashic description of
Aaron's death: ==Holidays==