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The new moon.

At 19:29:50 UT Monday 18 December 2017
the moon’s phase was

NEW

Time Zone:   

Some factors that go into this equation:

Universal Time is 19.5138888888889 in decimal hours.
The Julian date was 2458105.50250499.
The sun’s ecliptic longitude was 267.105912044927 degrees.
Its mean anomaly was 344.8383880076 degrees.
The moon’s true longitude was 1712.84357809223 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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