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The full moon.

At 13:13:49 UT Wednesday 31 January 2018
the moon’s phase was

FULL

Time Zone:   

Some factors that go into this equation:

Universal Time is 13.2469444444444 in decimal hours.
The Julian date was 2458150.49999906.
The sun’s ecliptic longitude was 311.615545187502 degrees.
Its mean anomaly was 27.9494968042 degrees.
The moon’s true longitude was 2291.50430070761 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.)

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