Moon Phase Calculator

Moon phases from to   (enter four-digit years) โ€” calculate

Use locale settings:     (support varies)
(doesnโ€™t work for all locales)

Phases:  0.00 new, 0.25 first quarter, 0.50 full, 0.75 third quarter.

Times are given in Coordinated Universal Time, and local time using your systemโ€™s time zone and daylight saving time settings.

Calculations are based on the โ€œhigher accuracyโ€ equations in Astronomical Algorithms, second edition, by Jean Meeus, and the full VSOP87 data set.

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