Discover the current moon phase for any date. View illumination percentage, moon age, next full moon & new moon dates. Beautiful visual moon display. 100% client-side.
This free online tool shows you the exact moon phase for any date in the past or future. Simply select a date to see the moon's illumination percentage, its current phase name, how old the moon is in its cycle, and when the next full moon and new moon will occur. Perfect for photographers, gardeners, stargazers, and anyone curious about lunar cycles.
The calculator uses the synodic month cycle of 29.53 days, which provides excellent accuracy for general use. It is accurate to within a day for most purposes. For precise astronomical observations, professional ephemeris data is recommended.
A synodic month is the time it takes for the Moon to complete one full cycle of phases — from new moon to new moon. It lasts approximately 29.53 days, which is slightly longer than the Moon's orbital period around Earth because Earth is also moving around the Sun.
Moon phases affect many activities: photographers plan shoots around the full moon for lighting, gardeners follow lunar planting calendars, fishermen track tides (which are influenced by the moon), and stargazers avoid full moons for deep-sky observation due to light pollution.