Why is the Sabbath before Pesach called Shabbat HaGadol? What does it have to do with Creation, Judgement Day, and the Final Redemption? Find out in this class where we also take a deep dive into the various Jewish calendars that were used 2000 years ago at the end of the Second Temple era, and how the “great calendar debate” still affects us today. Plus: the Zohar on the secret behind the solar calendar and why Earth’s orbit is 365 days.