To look up the phase of the moon for any date,
just fill out the form below, then hit "Find Phase."
At 20:09:25 UT Saturday 22 December 2018
the moon’s phase will be
is 20.1736111111111 in decimal hours.
The Julian date will be 2458475.4999051.
The sun’s ecliptic longitude will be 270.95822739575 degrees.
Its mean anomaly will be 348.5693564086 degrees.
The moon’s mean longitude will be 318.351648 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.)