You are hereUCG.org / Sermons / The Hebrew Calendar The Hebrew Calendar Given on Dec 25, 2021 by David Chornomaz Listen Downloads MP3 Audio (71.73 MB) Downloads The Hebrew Calendar MP3 Audio (71.73 MB) × Why do we keep the dates that we do for Holy Days? Learn how the Hebrew calendar is calculated to ensure that God's Holy Days fall at their appointed seasons.