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At 04:19:21 UT Wednesday 31 January 2018
the moon’s phase was
is 4.33916666666666 in decimal hours.
The Julian date was 2458150.49784624.
The sun’s ecliptic longitude was 311.238894691806 degrees.
Its mean anomaly was 27.5836664868 degrees.
The moon’s true longitude was 2285.91891444124 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.)