Lunar Calendar Calculator
Calculate moon phases, lunar age, and approximate lunar calendar dates. Track the lunar cycle and tidal influences.
Gibbous+
Waxing Gibbous
86.8% Illuminated
Lunar Age
11.27 days
Lunar Day
Day 12
Upcoming Moon Phases
Next New Moon6/15/2026 (19 days)
Next First Quarter26 days
Next Full Moon5/31/2026 (4 days)
Next Last Quarter11 days
Tidal Influence
Neap Tides (Moderate)
Spring tides occur during new and full moons when the Sun, Moon, and Earth align.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.