SPC-12Special
Moon Phase
Tonight’s Moon — or any date’s
SPC-12Result
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Moon Phase
Pick a date and the tool draws the Moon with the correct illumination and names the phase, age in days and lit fraction. Works for any date: check what the Moon looked like the day you were born.
Frequently asked questions
What is the Moon’s age?
The number of days since the last new moon; a full cycle lasts about 29.53 days.
How accurate is it?
Plenty for calendars and curiosity: the error is on the order of a few hours.