Moon Phase Calculator



The Moon Phase Calculator allows you to check the phase of the moon for a month in any year 1900AD - 2100AD. This will I hope help connect you to the natural rhythms of the world and planets and maybe you'll start looking at the night sky just a little more.

The calculator also calculates the time of the full and new moons. To see this hover your cursor over full/new moon picture. Eclipses are denoted by *T for a total eclipse or *P for a partial eclipse. For more details about the eclipse as well as finding out when they are use the Lunar Eclipse Calculator.


The calculations are done in JavaScript and follow the methods given by Bradley Schaefer . His article appeared in Sky & Telescope for April 1994, page 86.

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