Yahrzeit Calculator

A yahrzeit is the anniversary of a death on the Hebrew calendar, and it moves against the Gregorian one because the two years are different lengths. Enter the Gregorian date of death, or the Hebrew date if that is what the plaque carries, say whether the death was after sunset, and it lists the yahrzeit for as many years as you ask with the evening each one begins. It handles the dates that do not exist every year: a death on 30 Cheshvan or 30 Kislev moves to the following Rosh Chodesh in a year where that month is short, a death on 30 Adar I falls on 30 Shevat in a common year, and a death in the single Adar of a common year is kept in Adar I by Ashkenazi practice and Adar II by Sephardi. You choose the custom and the other date is printed alongside, because this is a real dispute and a rabbi settles it rather than a calculator.