Historical & Astronomical
Moon Phase Calculator
Calculate the exact Moon phase, illumination percentage, and lunar age for any date past, present, or future. Interactive lunar cycle simulator.
Date & Age Calculator
Total Calendar Days364 Days
Working Business Days260 Work Days
Frequently Asked Questions
How long does a complete moon cycle take?
A complete synodic month (from one New Moon to the next) takes approximately 29.5306 days (29 days, 12 hours, 44 minutes).
Can I find the moon phase for the day I was born?
Yes, simply enter your birth date to see the exact phase and illumination of the moon on the night of your birth.
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