Yahrzeits That Pull Neshomos Out of Gehinnom

On the yahrzeit of the Toras Chaim, the Imrei Chaim of Vizhnitz once remarked, "Chai (18th) Iyar is Lag BaOmer, the yahrzeit and hilula of Rav Shimon bar Yochai. A week before, on the 11th of Iyar, is the yahrzeit of my zeide, the holy Ropshitzer, and on the other side, on the 25th of Iyar, is the yahrzeit of my zeide, the Toras Chaim. They all grab neshomos and pull them out of Gehinnom."