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Strange Universe With Bob Berman
Strange Universe

Lunar cycles and holidays

By Bob Berman
Published April 20, 2025 at 9:30 AM EDT
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NASA/Bill Dunford

For centuries, the full moon guided calendars and celebrations — and its legacy lives on. This weekend, we explore how lunar cycles still determine the timing of some holidays. Ever wonder why Easter moves around or why there's always a full moon during this time. It all comes down to ancient rules and celestial rhythms that still shape our holidays today.

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Strange Universe planetLunar EclipseNASA
Bob Berman
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