To look up the phase of the moon for any date,
just fill out the form below, then hit "Find Phase."

The full moon.

At 13:27:26 UT Wednesday 10 May 2017
the moon’s phase will be


Time Zone:   

Some factors that go into this equation:

Universal Time is 13.4738888888889 in decimal hours.
The Julian date will be 2457884.49893391.
The sun’s ecliptic longitude will be 50.098823315784 degrees.
Its mean anomaly will be 125.77662030507 degrees.
The moon’s true longitude will be 226.356627482746 degrees.

These calculations incorporate the switch to the English New Style (N.S.)—i.e., Gregorian— calendar after Wednesday, 02 September 1752; the next day became Thursday, 14 September, skipping eleven days. (Please also note that, while fairly accurate, these calculations remain a bit buggy.)

 Send comments to

© 1997–2017 by 3IP.