Rabbi Avraham Meyer Zajac – At around the 17:00 minute mark of the today’s Daf Yomi shiur video – Rabbi Zajac discusses the ATBASH formula for figuring out what days of the week the Jewish holidays fall out on that year.
https://www.chabad.org/dailystudy/talmud_cdo/aid/4100171/jewish/Talmud-Menachot-65.htm
If you are interested in more videos from this Rabbi please visit this YouTube Channel:
https://www.chabad.org/multimedia/video_cdo/aid/3097752/jewish/Daily-Halachah.htm
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