What Is The Jewish Calendar Based On. The jewish or hebrew calendar is a lunisolar calendar created and used by the hebrew people—it’s “lunar” in that every month follows the phases of the moon, and “solar” because the. In the land of egypt.

An extra month is intercalated every 3 years, based on a cycle of 19 years. The jewish calendar is primarily lunar, with each month beginning on the new moon, when the first sliver of moon becomes visible after the dark of the moon.