Who invented the Yahrtzeit tablet (panel)? At first glance, this could not have been common before 150 years ago, as there is no room to place candles where the electric lights go. Who invented ...
It is common knowledge that Moshe Rabeinu was Niftar on 7 Adar. Was it a plain year with 1 Adar or a leap year with 2 Adars? If it was a leap year on what Adar was he Niftar?