Moon ExactlyTime since New Moon
Moon Age Today
The Moon is 20.6 elapsed days past the preceding New Moon at August 12, 2026 at 5:37 PM UTC.
Current Moon
Waning Gibbous
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What lunar age means
Moon age is elapsed time since the most recent astronomical New Moon. Individual New-Moon-to-New-Moon cycles vary around the 29.53-day mean, so Moon Exactly searches for the actual preceding New Moon rather than converting phase angle into a fixed-length cycle.
What it does not mean
This value is not the Moon’s geological age, which is measured in billions of years. It is also different from phase angle: two values closely track one another, but the Moon’s changing orbital speed means they are not interchangeable.
Questions, answered
Frequently asked questions
How is Moon age calculated?
It is the elapsed UTC duration between the requested instant and the preceding calculated New Moon.
Why does another site differ?
Some calculators estimate age from phase angle or a fixed 29.53-day cycle, while this page uses the preceding event timestamp.
Does Moon age depend on location?
No. It is based on global astronomical instants; only local clock labels differ.