Last Day of Passover ~ 22 Nisan (Weds, April 16, 2020)
Shavuot ~ 7 Sivan (Mon, May 30, 2020)
Yom Kippur ~ 10 Tishrei (Mon, Sep 10, 2020)
Shemni Atzeret ~ 22 Tishrei (Sat, Oct 10, 2020)
It is customary to light the memorial candle after
sunset on the eve of the yahrzeit date.
If the yahrzeit is on a Shabbat, the memorial candle should
be lit before the Shabbat candles are lit.
The candle should burn at least until after nightfall the next day
(i.e., when the yahrzeit ends). It should be left to burn out on its own.
If the yahrtzeit is on Sunday, the candle should be lit
after evening prayers and havdalah.