Moon enters new phase on May 16, 2026; May features rare double full moon

On May 16, 2026, the Moon entered its New phase — invisible against the night sky, its illuminated face turned entirely toward the Sun — marking the quiet beginning of a fresh lunar cycle. May 2026 is an uncommon month for sky-watchers: its 31 days are wide enough to hold two Full Moons, one on the first and another on the last day of the month, a rare celestial bookend. This rhythm of light and shadow, averaging 29.5 days per cycle, is among the oldest clocks humanity has ever read — shaping tides, harvests, and the human sense of time itself.