To the Wolf:
You wrote:
“The calendar is jury-rigged to prevent Yom Kippur from falling out on a Friday.”
Actually in a recent artical (Mishpacha Kulmas) it said that the rules of LO ADO ROSH is to prevent Yom Kippur from falling on Friday and Sunday so that there wouldn’t be two days of (total) issur malacha in a row, and also that HaShana Rabba should not fall on Shabbos.