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At 20:09:25 UT Saturday 22 December 2018
the moon’s phase was
is 20.1736111111111 in decimal hours.
The Julian date was 2458475.4999051.
The sun’s ecliptic longitude was 270.95822739575 degrees.
Its mean anomaly was 348.5693564086 degrees.
The moon’s mean longitude was 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.)